| Patent application number | Description | Published |
|---|
| 20120289708 | Carbazole Compound, Light-Emitting Element Material, and Organic Semiconductor Material - A novel carbazole compound that can be used for a transport layer, a host material, or a light-emitting material in a light-emitting element. In the carbazole compound, two carbazole skeletons each include carbazole, the 3-position of which is bonded to the 4-position of a dibenzofuran skeleton or a dibenzothiophene skeleton and these two carbazole skeletons are linked via benzene or biphenyl. The carbazole compound has an excellent carrier-transport property and a wide energy gap and can be suitably used for a material in a light-emitting element or for an organic semiconductor material. | 11-15-2012 |
| 20130009138 | COMPOSITE MATERIAL, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, AND ORGANIC COMPOUND - A composite material including an organic compound and an inorganic compound, which has a high carrier-transport property; a composite material having an excellent property of carrier injection to an organic compound; a composite material in which light absorption due to charge transfer interaction is unlikely to occur; and a composite material having a high visible-light-transmitting property are provided. A composite material which includes an organic compound and an inorganic compound exhibiting an electron-accepting property with respect to the organic compound, in which the rings of the organic compound are all benzene rings and the number of the benzene rings of the organic compound is greater than or equal to 4 and less than or equal to 25, is provided. | 01-10-2013 |
| 20130048964 | Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Novel Organic Compound - A light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and the second compound is an organic compound having a pyrimidine skeleton. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a diazine skeleton, and the second compound is an organic compound having a pyrimidine skeleton. | 02-28-2013 |
| 20130082591 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - To provide a novel heterocyclic compound that can be used as a host material in which a light-emitting substance of a light-emitting layer is dispersed. A heterocyclic compound comprising a dibenzo[f,h]quinoxaline ring and two hole-transport skeletons, where the dibenzo[f,h]quinoxaline ring and the two hole-transport skeletons are bonded to an aromatic hydrocarbon group. A heterocyclic compound represented by the following general formula (G1) is provided. | 04-04-2013 |
| 20130088144 | Phosphorescent Iridium Metal Complex, Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - Provided is a light-emitting element including a phosphorescent iridium metal complex that emits phosphorescence in a yellow green to orange wavelength range, and has high emission efficiency and reliability. Thus, further provided is the phosphorescent iridium metal complex that emits phosphorescence in the yellow green to orange wavelength range. Further provided are a light-emitting device, an electronic appliance, and a lighting device each of which includes the above light-emitting element. The light-emitting element includes an EL layer between a pair of electrodes, and the EL layer contains a phosphorescent iridium metal complex where nitrogen at the 3-position of a pyrimidine ring having an aryl group bonded to the 4-position is coordinated to a metal, a substituent having a carbazole skeleton is bonded to the 6-position of the pyrimidine ring, and the aryl group bonded to the 4-position of the pyrimidine ring is ortho-metalated by being bonded to the metal. | 04-11-2013 |
| 20130137866 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, a novel organometallic complex that can emit phosphorescence in the green to red wavelength region and has high emission efficiency and a high yield of synthesis is provided. One embodiment of the present invention is an organometallic complex in which a diketone having a five-membered or six-membered alicyclic structure composed of carbon and hydrogen is a ligand. | 05-30-2013 |
| 20130165653 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, an organometallic complex with high emission efficiency which achieves improved color purity by a reduction of half width of an emission spectrum is provided. One embodiment of the present invention is an organometallic complex in which a β-diketone and a six-membered heteroaromatic ring including two or more nitrogen atoms inclusive of a nitrogen atom that is a coordinating atom are ligands. In General Formula (G1), X represents a substituted or unsubstituted six-membered heteroaromatic ring including two or more nitrogen atoms inclusive of a nitrogen atom that is a coordinating atom. Further, R | 06-27-2013 |
| 20130240851 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex. | 09-19-2013 |
| 20130256637 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - Provided is a light-emitting element with a small degree of luminance degradation with accumulation of driving time (a long-lifetime light-emitting element). Provided is a light-emitting element in which a light-emitting layer with an electron-transport property is formed with a plurality of layers containing different host materials. Further, the LUMO level of a host material on an anode side is higher than the LUMO level of a host material on a cathode side. With such a structure, it is possible to provide a long-lifetime light-emitting element with little degradation in luminance with accumulation of driving time. | 10-03-2013 |
| 20130270531 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting layer, which is a stack of a first light-emitting layer and a second light-emitting layer, is provided between an anode and a cathode. The first light-emitting layer is formed on the anode side and contains a first light-emitting substance converting triplet excitation energy into light emission, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property. The second light-emitting layer contains a second light-emitting substance converting triplet excitation energy into light emission, the first organic compound, and a third organic compound having a hole-transport property. The second organic compound has a lower HOMO level than the third organic compound. The first light-emitting substance emits light with a wavelength shorter than that of light emitted from the second light-emitting substance. The first and the second organic compounds form an exciplex. The first and the third organic compounds form an exciplex. | 10-17-2013 |
| 20130277653 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved; a light-emitting element including the organic compound; and a light-emitting device, an electronic device, and a lighting device each including the light-emitting element. The light-emitting element includes a hole-transport layer and a light-emitting layer between a pair of electrodes. At least one of the hole-transport layer and the light-emitting layer includes an organic compound having a skeleton represented by General Formula (G0). | 10-24-2013 |
| 20130277655 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element which has low driving voltage and high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an electron-transport property, a second organic compound having a hole-transport property, and a light-emitting third organic compound converting triplet excitation energy into light emission. A combination of the first organic compound and the second organic compound forms an exciplex. The hole-transport layer contains at least a fourth organic compound whose HOMO level is lower than or equal to that of the second organic compound and a fifth organic compound whose HOMO level is higher than that of the second organic compound. | 10-24-2013 |
| 20130277656 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element which has low driving voltage and high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an electron-transport property, a second organic compound having a hole-transport property, and a light-emitting third organic compound converting triplet excitation energy into light emission. A combination of the first organic compound and the second organic compound forms an exciplex. The hole-transport layer is formed using two or more kinds of organic compounds and contains at least the second organic compound. | 10-24-2013 |
| 20130281693 | Phosphorescent Organometallic Iridium Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, provided is a novel phosphorescent organometallic iridium complex that can emit phosphorescence in a blue green to red wavelength region and has high emission efficiency. The phosphorescent organometallic iridium complex has a ligand having a pyridyl pyrimidine skeleton, i.e., the phosphorescent organometallic iridium complex has a ligand having a structure represented by the following general formula (G0). | 10-24-2013 |
| 20130292656 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting layer, which is a stack of a first light-emitting layer and a second light-emitting layer, is provided between an anode and a cathode. The first light-emitting layer is formed on the anode side and contains a first light-emitting substance converting triplet excitation energy into light emission, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property. The second light-emitting layer contains a second light-emitting substance converting triplet excitation energy into light emission, the second organic compound, and a third organic compound having an electron-transport property. The first organic compound has a higher LUMO level than the third organic compound. The first light-emitting substance emits light with a wavelength shorter than that of light emitted from the second light-emitting substance. The first and the second organic compounds form an exciplex. The second and the third organic compounds form an exciplex. | 11-07-2013 |
| 20130324721 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided are a light-emitting element including a novel organometallic complex as an emission center, the organometallic complex, a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. One embodiment of the present invention is a light-emitting element including, as an emission center, an organometallic complex in which a benzofuropyrimidine derivative is coordinated to a metal. In particular, another embodiment is a light-emitting element including, as an emission center, an organometallic complex in which a benzofuropyrimidine derivative having an aryl group at the 4-position is coordinated to a metal. Another embodiment is a light-emitting element including, as an emission center, an organometallic complex in which nitrogen at the 3-position of a benzofuropyrimidine derivative having an aryl group at the 4-position is coordinated to a metal and the aryl group is bonded to the metal. | 12-05-2013 |
| 20130324729 | Method of Synthesizing Pyrazine Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel method in which a pyrazine derivative is synthesized without a synthetic pathway of a pyrazine halide derivative, which is a synthetic intermediate, whose pytazine skeleton is halogenated is provided. Furthermore, a light-emitting element, a light-emitting device, an electronic device, or a lighting device with high emission efficiency by using a pyrazine derivative obtained by the above synthesizing method as an EL material is provided. In the method, a pyrazine derivative is synthesized without a synthetic pathway of a pyrazine halide derivative, which is a synthetic intermediate, whose pytazine skeleton is halogenated. Specifically, a 2-arylpyrazine derivative having an aryl group or a heteroaryl group as a substituent is synthesized. | 12-05-2013 |
| 20140034927 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - A multicolor light-emitting element using fluorescence and phosphorescence, which has a small number of manufacturing steps owing to a relatively small number of layers to be formed and is advantageous for practical application can be provided. In addition, a multicolor light-emitting element using fluorescence and phosphorescence, which has favorable emission efficiency is provided. A light-emitting element which includes a light-emitting layer having a stacked-layer structure of a first light-emitting layer exhibiting light emission from a first exciplex and a second light-emitting layer exhibiting phosphorescence is provided. | 02-06-2014 |
| 20140034929 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar | 02-06-2014 |
| 20140034930 | Light-Emitting Element - To provide a light-emitting element which uses a fluorescent material as a light-emitting substance and has higher luminous efficiency. To provide a light-emitting element which includes a mixture of a thermally activated delayed fluorescent substance and a fluorescent material. By making the emission spectrum of the thermally activated delayed fluorescent substance overlap with an absorption band on the longest wavelength side in absorption by the fluorescent material in an S | 02-06-2014 |
| 20140034931 | Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Heterocyclic Compound - A light-emitting element with high heat resistance and high emission efficiency is provided. A novel heterocyclic compound that can be used in such a light-emitting element is provided. One embodiment of the present invention is a light-emitting element which includes, between a pair of electrodes, a layer containing a first organic compound, a second organic compound, and a light-emitting substance; the first organic compound includes one pyrimidine ring and one ring with a hole-transport skeleton; the second organic compound is an aromatic amine; and the light-emitting substance converts triplet excitation energy into light. A combination of the first organic compound, which includes the one pyrimidine ring and the one ring with the hole-transport skeleton, and the second organic compound, which is the aromatic amine, forms an exciplex. | 02-06-2014 |
| 20140034932 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - The light-emitting element has a structure in which a first organic compound and a second organic compound form an exciplex (excited complex) in a light-emitting layer. The S1 level and the T1 level of the formed exciplex are positioned extremely close to each other compared to the S1 level and the T1 level of the respective substances (the first organic compound and the second organic compound) before the formation of the exciplex. | 02-06-2014 |
| 20140061604 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting layer is provided between a pair of electrodes. The light-emitting layer is a stack of a first light-emitting layer, which contains a first phosphorescent compound, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property and is provided on the anode side, and a second light-emitting layer, which contains at least a second phosphorescent compound and the first organic compound having an electron-transport property. A combination of the first organic compound and the second organic compound forms an exciplex. | 03-06-2014 |
| 20140091293 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - Provided is a light-emitting element in which an adverse effect by halides in an EL layer is suppressed and which can be provided with low cost. The light-emitting element including at least two layers between an anode and a light-emitting layer. One of the two layers which is closer to the anode has higher concentration of halides and halogen elements than the other layer closer to the light-emitting layer. | 04-03-2014 |
| 20140124764 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - To provide a novel heterocyclic compound capable of being used as a host material in which a light-emitting substance is dispersed. To provide a light-emitting element having a long lifetime. A heterocyclic compound in which a dibenzo[f,h]quinoxalinyl group and a benzo[b]naphtho[1,2-d]furanyl group are bonded through an arylene group having 6 to 13 carbon atoms. The dibenzo[f,h]quinoxalinyl group, the benzo[b]naphtho[1,2-d]furanyl group, and the arylene group separately are unsubstituted or have, as a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 13 carbon atoms. | 05-08-2014 |
| 20140131686 | Light-Emitting Element, Light-Emitting Device, Lighting Device, and Electronic Device - To provide a light-emitting element including a novel compound, which is capable of being used for a transport layer, a host material, or a light-emitting material in a light-emitting element. A light-emitting element which includes an EL layer between a pair of electrodes. In an analysis of the EL layer by liquid chromatography mass spectrometry, an ion having a mass/charge ratio (m/z) of 772 is detected, and by collision of an argon gas with the ion at an energy greater than or equal to 30 eV and less than or equal to 100 eV, one or more of an ion having a mass/charge ratio (m/z) of 349 and an ion having a mass/charge ratio (m/z) of 425 is or are detected. | 05-15-2014 |
| 20140231770 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel substance capable of emitting phosphorescence is provided. An organometallic complex represented by General Fomulae (G3) or (G5). In the formulae, M represents iridium, platinum, palladium, or rhodium, R | 08-21-2014 |
| 20140246656 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, an organometallic complex having high emission efficiency and improved color purity is provided. The color purity is improved by reducing the half width of an emission spectrum. The organometallic complex is represented by General Formula (G1). In General Formula (G1), at least one of R | 09-04-2014 |
| 20140284578 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An organic compound having a low HOMO level and a high hole-transport property is provided. The organic compound is represented by Formula (G1), where Ar | 09-25-2014 |
| 20140291643 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - A novel organic compound that forms an exciplex emitting light with high efficiency is provided. An organic compound with a triarylamine skeleton in which the three aryl groups of the triarylamine skeleton are a p-biphenyl group, a fluoren-2-yl group, and a phenyl group to which a dibenzofuranyl group or a dibenzothiophenyl group is bonded. By the use of the organic compound and an organic compound with an electron-transport property, an exciplex that emits light with extremely high efficiency can be formed. | 10-02-2014 |
| 20140291645 | Light-Emitting Element, Compound, Organic Compound, Display Module, Lighting Module, Light-Emitting Device, Display Device, Lighting Device, and Electronic Device - A light-emitting element having high emission efficiency is provided. A light-emitting element having a low driving voltage is provided. A novel compound which can be used for a transport layer or as a host material or a light-emitting material of a light-emitting element is provided. A novel compound with a benzofuropyrimidine skeleton is provided. Also provided is a light-emitting element which includes the compound with the benzofuropyrimidine skeleton between a pair of electrodes. | 10-02-2014 |
| 20140319492 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - Provided is a light-emitting element with high emission efficiency. The light-emitting element including a first electrode, a second electrode, and a layer containing an organic compound between the first electrode and the second electrode. The layer containing the organic compound includes a light-emitting layer at least containing a first organic compound, a second organic compound, and a fluorescent substance. The first organic compound has an electron-transport property. The second organic compound has a hole-transport property. The second organic compound has a triarylamine skeleton. At least one of three aryl groups in the triarylamine skeleton is a group including a p-biphenyl skeleton. | 10-30-2014 |
| 20140330017 | Heterocyclic Compound, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Lighting Device, and Electronic Device - Provided is a heterocyclic compound that can be used for a carrier-transport material, a host material, or a light-emitting material in a light-emitting element. The heterocyclic compound has an indolo[3,2,1-jk]carbazole skeleton and a dibenzo[f,h]quinoxaline skeleton which are linked to each other through an arylene group. The wide band gap of the heterocyclic compound allows excitation of a green-emissive phosphorescent material, which contributes to the formation of a highly efficient light-emitting element. | 11-06-2014 |
| 20140339526 | ORGANOMETALLIC COMPLEX, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE - A light-emitting element including a phosphorescent organometallic complex is provided. The organometallic complex emits phosphorescence in the yellow green to orange wavelength range and has high emission efficiency and high reliability. Thus, the organometallic complex that exhibits phosphorescence is provided. The organometallic complex, in which nitrogen at the 3-position of a pyrimidine ring is coordinated to a metal, a carbazole skeleton is bonded to the 4-position of the pyrimidine ring, and the carbazole skeleton is bonded to the metal, is used as an emission center. The metal is preferably a Group 9 element or a Group 10 element, more preferably iridium. | 11-20-2014 |
| 20140367662 | Organometallic Iridium Complex, Light-Emitting Element, Light-Emitting Device, and Lighting Device - An organometallic iridium complex that has high emission efficiency and a long lifetime and emits deep red light (emission wavelength: around 700 nm) is provided. The organometallic iridium complex has a ligand that is represented by General Formula (G0) and has at least a dimethyl phenyl group and a quinoxaline skeleton. | 12-18-2014 |
| 20150060813 | Heterocyclic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel heterocyclic compound that can be used as a host material in which a light-emitting substance is dispersed. A light-emitting element having a long lifetime. A heterocyclic compound in which a substituted or unsubstituted dibenzo[f,h]quinoxalinyl group is bonded to a substituted or unsubstituted arylene group having 6 to 25 carbon atoms which is bonded to any one of the 8-11 positions of a substituted or unsubstituted benzo[b]naphtho[1,2-d]furan skeleton. | 03-05-2015 |
| 20150060818 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a novel organic compound that can be used as a host material of a light-emitting layer in which a light-emitting substance is dispersed. The organic compound is represented by General Formula (G1-1). In the formula, A represents a substituted or unsubstituted dibenzo[f,h]quinoxalin-yl group, Ar | 03-05-2015 |
| 20150060824 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a novel organic compound that is used as a host material in which a light-emitting substance is dispersed. The organic compound is represented by General Formula (G1). In the formula, A represents a substituted or unsubstituted dibenzofuran-diyl group, a substituted or unsubstituted dibenzothiophene-diyl group, a substituted or unsubstituted N-aryl-9H-carbazole-diyl group, or a substituted or unsubstituted N-alkyl-9H-carbazole-diyl group; Ar | 03-05-2015 |
| 20150073144 | Phosphorescent Organometallic Iridium Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, provided is a novel phosphorescent organometallic iridium complex that can emit phosphorescence in a blue green to red wavelength region and has high emission efficiency. The phosphorescent organometallic iridium complex has a ligand having a pyridyl pyrimidine skeleton, i.e., the phosphorescent organometallic iridium complex has a ligand having a structure represented by the following general formula (G0). | 03-12-2015 |
| 20150073147 | Organic Compound, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - A novel organic compound is provided. In addition, a novel organic compound with high heat resistance is provided. In the organic compound, a dibenzoquinoxaline skeleton and a 4,4-bidibenzofuran skeleton or a 4,4′-bidibezothiophene skeleton are connected to each other through an arylene group. | 03-12-2015 |
| 20150270504 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex. | 09-24-2015 |
| 20150270505 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting layer, which is a stack of a first light-emitting layer and a second light-emitting layer, is provided between an anode and a cathode. The first light-emitting layer is formed on the anode side and contains a first light-emitting substance converting triplet excitation energy into light emission, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property. The second light-emitting layer contains a second light-emitting substance converting triplet excitation energy into light emission, the first organic compound, and a third organic compound having a hole-transport property. The second organic compound has a lower HOMO level than the third organic compound. The first light-emitting substance emits light with a wavelength shorter than that of light emitted from the second light-emitting substance. The first and the second organic compounds form an exciplex. The first and the third organic compounds form an exciplex. | 09-24-2015 |
| Patent application number | Description | Published |
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| 20110198988 | ORGANOMETALLIC COMPLEX AND LIGHT-EMITTING ELEMENT, LIGHTING DEVICE, AND ELECTRONIC DEVICE INCLUDING THE ORGANOMETALLIC COMPLEX - A first object is to provide an organometallic complex capable of exhibiting phosphorescence. In General Formula (G1), at least one substituent of R | 08-18-2011 |
| 20110210316 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - An object is to provide a novel heterocyclic compound which can be used for a light-emitting element, as a host material of a light-emitting layer in which a light-emitting substance is dispersed. Other objects are to provide a light-emitting element having low driving voltage, a light-emitting element having high current efficiency, and a light-emitting element having a long lifetime. Provided are a light-emitting element including a compound in which a dibenzo[f,h]quinoxaline ring and a hole-transport skeleton are bonded through an arylene group, and a light-emitting device, an electronic device, and a lighting device each using this light-emitting element. The heterocyclic compound represented by General Formula (G1) below is provided. | 09-01-2011 |
| 20110215307 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element includes an EL layer between an anode and a cathode, and a first layer, a second layer, and a third layer between the cathode and the EL layer. The first layer provided between the cathode and the second layer is in contact with the cathode and the second layer, and includes a substance having a hole-transport property and an acceptor substance. The second layer provided between the first layer and the third layer is in contact with the first layer and the third layer, and includes a phthalocyanine-based material. The third layer provided between the second layer and the EL layer is in contact with the second layer and the EL layer, and includes an alkali metal, an alkaline-earth metal, a rare-earth metal, an alkali metal compound, an alkaline-earth metal compound, or a rare-earth metal compound. | 09-08-2011 |
| 20110215714 | Light-Emitting Element and Lighting Device - To provide a light-emitting element whose power efficiency is improved and which emits light of natural color like light bulb color. In the light-emitting element, at least three light-emitting units are stacked. The emission spectrum of the light-emitting element has two peaks. One of the two peaks is obtained by combining spectra of light emitted from two light-emitting units. The peak is in the yellow to orange wavelength range and has a wavelength greater than or equal to 560 nm and less than 580 nm. Thus, a wavelength range of high luminosity can be used and the power efficiency can be improved. The color of light emitted from the light-emitting element is close to a blackbody locus in a chromaticity diagram, and light of natural color like light bulb color can be achieved. | 09-08-2011 |
| 20110220882 | Organometallic Complex, Light-Emitting Element, Display Device, Electronic Device, and Lighting Device - A novel substance exhibiting phosphorescence is provided. The novel substance is an organometallic complex represented by General Formula (G1). In General Formula (G1), R | 09-15-2011 |
| 20110233530 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided are a light-emitting element in which a driving voltage increase can be suppressed and a light-emitting device which has reduced power consumption by including the light-emitting element. The element includes an EL layer between an anode and a cathode, and has a first, a second, and a third layer between the cathode and the EL layer. The first layer is between and in contact with the cathode and the second layer and includes a hole-transport substance. The second layer is between and in contact with the first the third layers and includes a phthalocyanine-based material. The third layer is between and in contact with the second and EL layers and includes an alkali metal, an alkaline-earth metal, a rare-earth metal, an alkali metal compound, an alkaline-earth metal compound, or a rare-earth metal compound. The phthalocyanine-based material has a metal-oxygen bond. | 09-29-2011 |
| 20110240971 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element that emits light with high luminance and can be driven at low voltage. The light-emitting element includes n (n is a natural number greater than or equal to 2) EL layers between an anode and a cathode, and includes a first layer, a second layer, and a third layer between an m-th (m is a natural number, 1≦m≦n−1) EL layer from the anode and an (m+1)th EL layer. The first layer functions as a charge-generation region, has hole-transport properties, and contains an acceptor substance. The third layer has electron-transport properties and contains an alkali metal or the like. The second layer is formed of a phthalocyanine-based material and is provided between the first layer and the third layer, whereby an injection barrier at the time of injecting electrons generated in the first layer into the m-th EL layer through the third layer can be lowered. | 10-06-2011 |
| 20110240972 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element which emits light with high luminance and can be driven at low voltage. The light-emitting element includes n (n is a natural number of 2 or more) EL layers between an anode and a cathode, and includes a first layer, a second layer, and a third layer between an m-th (m is a natural number, 1≦m≦n−1) EL layer from the anode and an (m+1)th EL layer. The first layer functions as a charge-generation region, has hole-transport properties, and contains an acceptor substance. The third layer has electron-transport properties and contains an alkali metal or the like. The second layer formed of a metal complex having a metal-oxygen bond and an aromatic ligand is provided between the first and third layers, whereby an injection barrier at the time of injecting electrons generated in the first layer into the m-th EL layer through the third layer can be lowered. | 10-06-2011 |
| 20110245495 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An object is to provide a novel organometallic complex capable of emitting phosphorescence by using, as a ligand, an organic compound with which a variety of derivatives can be easily synthesized. Another object is to provide an organometallic complex having high heat resistance. Other objects are to provide a light-emitting element having high emission efficiency and to provide a light-emitting device, an electronic device, and a lighting device having reduced power consumption. Provided are an organometallic complex including a structure represented by the following General Formula (G1), and a light-emitting element, a light-emitting device, an electronic device, and a lighting device formed using the organometallic complex including the structure represented by the following General Formula (G1). | 10-06-2011 |
| 20110248246 | AROMATIC AMINE DERIVATIVE, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - Provided is a novel aromatic amine derivative represented by General Formula (G1) below. (In the formula, A represents oxygen or sulfur, and R | 10-13-2011 |
| 20110260190 | Light-Emitting Device - Blue organic EL elements, which have a shorter lifetime and lower luminance characteristics than green and red ones, have had a problem: particularly when blue elements are used in a light-emitting device capable of modulating light emission colors, light significantly attenuates and characteristics further deteriorates. A dielectric mirror which is selective in wavelength is provided between organic EL elements, and the number of times especially blue light emission from an organic EL element is transmitted through an electrode having a light-transmitting property is reduced as much as possible, so that attenuation of light is suppressed. Thus, a light-emitting device capable of modulation of light emission colors which has a high luminance and a long lifetime can be provided. In the light-emitting device, voltages applied to the organic EL elements, which deteriorate individually, are separately controlled, whereby the color tone can be kept constant for a long period. | 10-27-2011 |
| 20110285276 | Triazole Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device and Lighting Device Using the Triazole Derivative - Objects are to provide the following: a substance that facilitates hole injection and has high triplet excitation energy; a light-emitting element having high emission efficiency using the substance that facilitates hole injection and has high triplet excitation energy; a light-emitting element having low driving voltage; and a light-emitting device, an electronic device, and a lighting device having low power consumption. Provided is a triazole derivative in which a dibenzothiophen-4-yl or dibenzofuran-4-yl group represented by General Formula (G2) is bonded to any one of Ar | 11-24-2011 |
| 20110315968 | Light-Emitting Element, Light-Emitting Device, Display, and Electronic Device - In the light-emitting element in which a plurality of EL layers is separated from each other by a charge generation layer, provided are an electron relay layer in contact with an anode side of the charge generation region and an electron transport layer in contact with the electron relay layer. The electron transport layer contains an alkaline earth metal. A concentration gradient of the alkaline earth metal contained in the electron transport layer is such that the concentration of the alkaline earth metal becomes lower from an interface between the electron transport layer and the electron relay layer to the anode. | 12-29-2011 |
| 20120018767 | Light-Emitting Device, Lighting Device, and Manufacturing Method of Light-Emitting Device - The manufacturing method of the light-emitting device is provided in which an auxiliary electrode in contact with an electrode formed using a transparent conductive film of a light-emitting element is formed using a mask, and direct contact between the auxiliary electrode and an EL layer is prevented by oxidizing the auxiliary electrode. Further, the light-emitting device manufactured according to the method and the lighting device including the light-emitting device are provided. | 01-26-2012 |
| 20120018769 | Light-Emitting Device, Lighting Device, and Manufacturing Method of Light-Emitting Device - It is an object to provide a light-emitting device which has high power efficiency and high light-extraction efficiency and emits light uniformly in a plane. It is another object to provide a manufacturing method of the light-emitting device. It is another object to provide a lighting device including the light-emitting device. One embodiment of the present invention provides a light-emitting device which includes: a first electrode provided over a substrate; a layer containing a light-emitting organic compound provided over the first electrode; an island-shaped insulating layer provided over the layer containing the light-emitting organic compound; an island-shaped auxiliary electrode layer provided over the island-shaped insulating layer; and a second electrode having a property of transmitting visible light provided over the layer containing the light-emitting organic compound and the island-shaped auxiliary electrode layer. | 01-26-2012 |
| 20120025178 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An object is to provide a novel organometallic complex that has a broader emission spectrum in the wavelength range of green to blue. Other objects are to provide a light-emitting element using the organometallic complex, and a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. Provided is an organometallic complex represented by a general formula (G1). Represented by the general formula (G1) is a novel organometallic complex that exhibits a broad emission spectrum in the wavelength range of green to blue. Further provided are a light-emitting element using the organometallic complex, and a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. | 02-02-2012 |
| 20120025697 | Triazole Derivative, Heterocyclic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device and Lighting Device - A substance that facilitates hole injection and has high triplet excitation energy is provided. A light-emitting element having high emission efficiency is provided. A light-emitting element driven with a low voltage is provided. Or a light-emitting element having a long lifetime is provided. Provided is a light-emitting element including a triazolo[4,3-f]phenanthridine derivative or a triazolo[3,4-a]isoquinoline derivative. Provided is a triazolo[4,3-f]phenanthridine and triazolo[3,4-a]isoquinoline derivatives, which are novel and can be used for the light-emitting element. | 02-02-2012 |
| 20120061651 | Heterocyclic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A substance having a hole-transport, property and a wide band gap is provided. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, α | 03-15-2012 |
| 20120061652 | SEMICONDUCTOR DEVICE AND LIGHT-EMITTING DEVICE, AND MANUFACTUIRNG METHOD THEREOF - In a semiconductor device including an organic layer containing a light-emitting substance between a first electrode connected to a source or drain electrode layer of an enhancement-type transistor that has a channel formation region using an oxide semiconductor and a second electrode overlapped with the first electrode, an active, electrically conductive material which produces a hydrogen ion or a hydrogen molecule by reducing an impurity including a hydrogen atom (e.g., moisture) is excluded from the second electrode. The semiconductor device including an oxide semiconductor is formed using especially an inert, electrically conductive material which hardly causes production a hydrogen ion or a hydrogen molecule by reacting with water. Specifically, the semiconductor device is formed using any of a metal, an alloy of metals, and a metal oxide each having a higher oxidation-reduction potential than the standard hydrogen electrode. | 03-15-2012 |
| 20120061707 | Solid-State Light-Emitting Element, Light-Emitting Device, and Lighting Device - A solid-state light-emitting element includes a structure body having a property of transmitting visible light and an uneven structure on each of the top side and the bottom side thereof; a high refractive index material layer provided on one surface of the structure body; and a light-emitting body with a refractive index of greater than or equal to 1.6 provided over the high refractive index material layer. One surface of the high refractive index material layer is flatter than the other surface thereof which is in contact with the structure body. The refractive index of the high refractive index material layer is greater than or equal to 1.6. The refractive index of the structure body is greater than 1.0 and less than that of the high refractive index material layer. | 03-15-2012 |
| 20120061708 | Light-Emitting Device and Lighting Device - Provided is a light-emitting device having a structure in which a high refractive index component is provided between a solid light-emitting element and air, has an uneven structure on a surface in contact with air, and can be reused. The light-emitting device includes a substrate having a refractive index of 1.6 or higher and a light-transmitting property, a solid light-emitting element including a light-emitting region having a refractive index of 1.6 or higher on one surface of the substrate, and a component having a refractive index of 1.6 or higher and a light-transmitting property on the other surface of the substrate, wherein the component includes an uneven structure on a surface in contact with air and is connected to the substrate via a liquid having a refractive index of 1.6 or higher and a light-transmitting property. | 03-15-2012 |
| 20120061714 | Fluorene Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Organic Compound - A substance having a hole-transport property and a wide band gap is provided. A fluorene compound represented by a general formula (G1) is provided. In the general formula (G1), α | 03-15-2012 |
| 20120071668 | Carbazole Derivative, Light-Emitting Element Material and Organic Semiconductor Material - An object is to provide a novel carbazole derivative that has an excellent carrier-transport property and can be suitably used for a transport layer or as a host material of a light-emitting element. Another object is to provide an organic semiconductor material and a light-emitting element material each using the carbazole derivative. As the carbazole derivative that can achieve the above objects, a carbazole derivative in which a carbazolyl group whose either 2- or 3-position of carbazole is substituted by the 4-position of a dibenzothiophene skeleton or a dibenzofuran skeleton is bonded to aromatic hydrocarbon that has 14 to 70 carbon atoms and includes a condensed tricyclic ring, a condensed tetracyclic ring, a condensed pentacyclic ring, a condensed hexacyclic ring, or a condensed heptacyclic ring has been able to be synthesized. | 03-22-2012 |
| 20120074390 | Light-Emitting Element and Electronic Device - An object is to provide a light-emitting element with high emission efficiency which includes a novel carbazole derivative that has a wide energy gap and can be used for a transport layer or a host material in a light-emitting element. A carbazole derivative in which the 4-position of dibenzothiophene or dibenzofuran is bonded to the 2- or 3-position of carbazole has been able to be provided by use of the carbazole derivative. Further, a light-emitting element having high emission efficiency has been able to be provided by use of the carbazole derivative. | 03-29-2012 |
| 20120077987 | ORGANIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R | 03-29-2012 |
| 20120080667 | COMPOSITE MATERIAL, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A composite material including an organic compound and an inorganic compound and having a high carrier-transport property is provided. A composite material having a high carrier-injection property to an organic compound is provided. A composite material in which light absorption due to charge transfer interaction is unlikely to occur is provided. A light-emitting element having high emission efficiency is provided by including the composite material. A light-emitting element having a low drive voltage is provided. A light-emitting element having a long lifetime is provided. A composite material including a heterocyclic compound having a dibenzothiophene skeleton or a dibenzofuran skeleton and an inorganic compound exhibiting an electron-accepting property with respect to the heterocyclic compound is provided. | 04-05-2012 |
| 20120095226 | ORGANOMETALLIC COMPLEX, AND LIGHT-EMITTING ELEMENT AND DISPLAY DEVICE USING THE ORGANOMETALLIC COMPLEX - An object is to provide an organometallic complex whose phosphorescence characteristics can be adjusted by varying the structure of a ligand. Alternatively, an object is to provide an organometallic complex capable of emitting yellow phosphorescence with high luminance. Alternatively, an object is to provide a light-emitting device with high added value. An organometallic complex which has a structure represented by a general formula (G1) below and at least one substituent group represented by a general formula (G2) below as a phenyl group and is formed in such a way that a phenylpyrazine derivative represented by a general formula (G0) below is ortho-metalated by an ion of a Group 9 metal or of a Group 10 metal is provided. Alternatively, a light-emitting element and a light-emitting device formed including the organometallic complex are provided. | 04-19-2012 |
| 20120097991 | Light-Emitting Element, Light-Emitting Device, and Lighting Device - Described is a solid-state light-emitting element, a light-emitting device using the solid-state light-emitting element, and a lighting device using the light-emitting device. The solid-state light-emitting element comprises a member with a low refractive index which has a hemispherical structure on a first surface and an uneven structure on a second surface, a bonding layer with a high refractive index which planarizes the uneven structure, and a light-emitting body whose light-emitting surface is in contact with a flat surface of the bonding layer. The uneven structure of the member with a low refractive index is provided inside at least an outside shape of the hemispherical structure formed on the first surface; and the light-emitting body is provided such that an outside shape of the light-emitting region of the light-emitting body is smaller than the outside shape of the hemispherical structure and overlaps with the hemispherical structure. | 04-26-2012 |
| 20120098417 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device and Lighting Device - Provided is a novel substance that can emit phosphorescence. Alternatively, provided is a novel substance with high emission efficiency. An organometallic complex in which a 4-arylpyrimidine derivative is a ligand and iridium is a central metal is provided. Specifically, an organometallic complex having a structure represented by a general formula (G1) is provided. In the general formula (G1), R | 04-26-2012 |
| 20120104369 | Phenanthrene Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel compound having high triplet excitation energy and a bipolar property is provided. Specifically, a phenanthrene compound represented by General Formula (G1) is provided where R | 05-03-2012 |
| 20120104373 | Organometallic Complex, and Light-Emitting Element and Display Device Using the Organometallic Complex - An object is to provide a novel organometallic complex capable of phosphorescence and having high heat resistance. Alternatively, an object is to provide a light-emitting device with high added value. The objects are achieved by providing an organometallic complex which has a structure represented by a general formula (G1) or (G2) below and is formed in such a way that a corresponding one of pyrazine derivatives represented by general formulae (G0) and (G0′) below is ortho-metalated by a Group 9 or Group 10 metal ion, or by providing a light-emitting element and a light-emitting device including the organometallic complex. | 05-03-2012 |
| 20120113632 | Lighting Device - A lighting device with high emission efficiency and directivity is provided with the use of an organic EL element and a light-emitting diode. The lighting device includes a light-emitting diode whose emission wavelength peak is greater than or equal to 400 nm and less than or equal to 500 nm, a planar organic EL light-emitting body which emits light having a complementary color of that of light from the light-emitting diode, and a planar reflector. The organic EL light-emitting body and the reflector face each other to form a cone having an open end to which light is emitted. The light-emitting diode is provided in a space between a plane including a light-emitting surface of the organic EL light-emitting body and a plane including a reflecting surface of the reflector. | 05-10-2012 |
| 20120126210 | Light-Emitting Element Material, Light-Emitting Element, Electronic Device, and Lighting Device - A light-emitting element material including an ionic iridium complex in which a 4,4′-bipyrimidine structure is coordinated to iridium is provided. Alternatively, a light-emitting element material including an ionic iridium complex represented by the following structural formula (1) is provided. In addition, a light-emitting element including the light-emitting element material is provided. | 05-24-2012 |
| 20120126211 | Light-Emitting Element Material, Light-Emitting Element, Electronic Device, and Lighting Device - A light-emitting element material including an ionic iridium complex in which a 2,6-bis(2-picolinyl)pyridine structure is coordinated to iridium is provided. Alternatively, a light-emitting element material including an ionic iridium complex represented by the following structural formula (1) is provided. In addition, a light-emitting element including the light-emitting element material is provided. | 05-24-2012 |
| 20120126268 | LIGHTING DEVICE - A lighting device is provided with a structure body which has an inner surface including a region with a negative Fresnel lens shape and a high refractive index material layer which is closely in contact with the inner surface. The high refractive index material layer has a Fresnel lens shape in a region closely in contact with the inner surface, and a plane light-emitting body is provided over the structure body with the high refractive index material layer interposed therebetween. The high refractive index material layer is provided so as to fill at least the negative Fresnel lens shape of the structure body and thus has a surface including the region with the Fresnel lens shape at the interface with the structure body. | 05-24-2012 |
| 20120126693 | LIGHTING DEVICE - A highly reliable lighting device is provided at low cost by using a simple structure and a simple process. A lighting device with improved convenience, which has a shape suitable for a purpose and can respond to diversified applications is provided. A light-emitting panel which includes a light-emitting element provided over a flexible substrate and including an electroluminescent (EL) layer (the panel is also referred to as an “EL film”) is put in a glass housing. The EL film is flexible and thus can be provided in a variety of forms in accordance with the shape of the glass housing. | 05-24-2012 |
| 20120126723 | Lighting Device - A lighting device using an electroluminescent material, in which color mixing and dimming can be performed by a simple method, is provided. A lighting device including a first light-emitting element and a second light-emitting element which emits light having a wavelength longer than that of light emitted from the first light-emitting element and starts to emit light at a lower voltage than the first light-emitting element, is provided. The first light-emitting element and the second light-emitting element are connected in parallel, whereby a mixed color of emission colors of the first light-emitting element and the second light-emitting element is controlled by a voltage applied to the first light-emitting element and the second light-emitting element. | 05-24-2012 |
| 20120130081 | Oxadiazole Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device Using the Oxadiazole Derivative - An object of one embodiment of the present invention is to provide a novel oxadiazole derivative as a substance having high excitation energy, in particular, a substance having high triplet excitation energy. One embodiment of the present invention is an oxadiazole derivative represented by General Formula (G1) below. | 05-24-2012 |
| 20120132855 | LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE - To provide a liquid crystal composition exhibiting a blue phase, which enables higher contrast, and a liquid crystal display device including the liquid crystal composition. The liquid crystal composition contains a chiral agent and liquid crystal containing a compound having three electron-withdrawing groups as end groups of a structure where a plurality of rings including at least one aromatic ring is linked to each other directly or with a linking group laid therebetween. The peak of the diffracted wavelength on the longest wavelength side in the reflectance spectrum of the liquid crystal composition is less than or equal to 450 nm, preferably less than or equal to 420 nm. Further, a liquid crystal display device can be provided using the liquid crystal composition. | 05-31-2012 |
| 20120132896 | Benzoxazole Derivative, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel benzoxazole derivative having high excitation energy, particularly high triplet excitation energy is provided. A light-emitting element having high current efficiency is provided by application of the novel benzoxazole derivative for the light-emitting element. A light-emitting device, an electronic device, and a lighting device each having reduced power consumption are provided. The benzoxazole derivative is represented by General Formula (G1). In the formula, R | 05-31-2012 |
| 20120133273 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a novel organometallic complex that has an emission region in the wavelength band of green to blue and high reliability. Provided is an organometallic complex including a structure represented by a general formula (G1). The organometallic complex represented by the general formula (G1) is a novel organometallic complex that has an emission region in the wavelength band of green to blue and high reliability. Further provided is a light-emitting element including the organometallic complex, and a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. | 05-31-2012 |
| 20120146025 | Light-Emitting Device, Electronic Device, and Lighting Device - A light energy reuse type light-emitting device with low power consumption is provided by converting light from a light-emitting device into electric power efficiently for reuse. Also, a light energy reuse type light-emitting device with high yield is provided. A light-blocking film of the light-emitting device is replaced to a photoelectric conversion element, so that light is converted into electric power. That is, conventionally, light is not emitted in a portion of a light-blocking film. In the disclosed invention, light which is not emitted can be converted into electric power by a photoelectric conversion element, and can be reused. Therefore, a light-emitting device with low power consumption is realized. | 06-14-2012 |
| 20120146521 | Method for Driving Light-Emitting Element and Method for Driving Light-Emitting Device - A method for driving a light-emitting element is provided with two steps: a first step of performing constant current drive; and a second step of increasing the absolute value of a voltage with time. It is assumed that a short circuit between a pair of electrodes occurs when a voltage which is applied to the light-emitting element is lower than or equal to the emission start voltage. A shift from the first step to the second step occurs when this condition is satisfied. Accordingly, a high current can be passed through a short-circuited portion between the pair of electrodes in the second step. The portion is insulated by heat (a short circuit between a pair of electrodes can be repaired), so that deterioration in the light-emitting element can be suppressed, and luminance of the light-emitting element can be recovered. | 06-14-2012 |
| 20120161116 | Lighting Device - A lighting device includes a plurality of organic EL light-emitting devices having organic EL elements, and a plurality of LEDs. The LEDs are provided as point light sources, and the organic EL light-emitting devices are provided as surface light sources. Using an LED which emits blue light and an organic EL element which emits yellow light, white light can be obtained. The LEDs are provided on the back side or the front side of the organic EL light-emitting devices so that light from the LEDs pass between the two organic EL light-emitting devices. Accordingly, light can be extracted from the LEDs without allowing the LED light to pass through the organic EL elements. Further, the organic EL element is sealed by two substrates and a sealant, whereby deterioration due to moisture or oxygen can be prevented. | 06-28-2012 |
| 20120165523 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, and Electronic Device Including the Organometallic Complex - Provided is a novel organometallic complex which can be synthesized easily and emits phosphorescence, or a compound which emits red phosphorescence. The inventors focused on easy synthesis of an m-aminophenyl pyrazine derivative represented by the following general formula (G0), synthesized an organometallic complex having a structure in which the derivative is coordinated to a Group 9 or Group 10 metal ion, and further synthesized a useful substance which emits red phosphorescence. | 06-28-2012 |
| 20120187394 | Display Device, Light-Emitting Device, Lighting Device, and Electronic Appliance - A light energy reuse type display device, light-emitting device, and lighting device with low power consumption, which efficiently convert light emitted from a light source (including light emission from a light-emitting element) into electric power, are provided. A photoelectric conversion element interposed between a pair of substrates functions as a color filter (a colored layer); thus, light emitted from a light source (including light emission from a light-emitting element) is efficiently converted into electric power, and a light energy reuse type display device, light-emitting device, and lighting device with low power consumption can be provided. | 07-26-2012 |
| 20120193613 | HETEROCYCLIC COMPOUND - Provided is a novel heterocyclic compound which can be used for a light-emitting element, as a host material of a light-emitting layer in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, A represents any of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group, R | 08-02-2012 |
| 20120194062 | Composite Material, Light-Emitting Element, Light-Emitting Device, Lighting Device, Electronic Device, and Fluorene Derivative - Provided is a composite material which makes it possible to provide a light-emitting element having at least one of the following characteristics by applying the composite material to the light-emitting element: low voltage driving, high emission efficiency, and a long life (high reliability). The composite material includes a hydrocarbon compound and an inorganic compound which exhibits an electron-accepting property with respect to the hydrocarbon compound. The hydrocarbon compound has a molecular weight of greater than or equal to 400 and less than or equal to 2000, where one or more aryl groups are bonded to a fluorene unit. | 08-02-2012 |
| 20120205632 | LIGHT-EMITTING ELEMENT - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained. | 08-16-2012 |
| 20120205633 | Light-Emitting Device and Manufacturing Method Thereof - An object of the present invention is to decrease the conductivity of a hole-injection layer (or a hole-transport layer) containing molybdenum oxide without decreasing the amount of molybdenum oxide so that crosstalk is prevented from occurring. A light-emitting element includes, between an anode and a cathode, an EL layer including at least a hole-injection layer and a light-emitting layer. In the light-emitting element, the hole-injection layer is provided between the anode and the light-emitting layer, and the hole-injection layer contains molybdenum oxide and an additive. The additive may be an alkali metal, an alkaline earth metal, a substance having a LUMO level of lower than or equal to −5.8 eV, or a substance having a hole mobility of lower than or equal to 10 | 08-16-2012 |
| 20120205634 | Light Emitting Unit, Light Emitting Device, and Lighting Device - The light-emitting unit has at least a first light-emitting element, a second light-emitting element, and a separation layer. The separation layer has a leg portion and a stage portion which protrudes outside of a bottom surface of the leg portion over the leg portion. An upper electrode of the first light-emitting element is electrically connected to a lower electrode of the second light-emitting element in a region where the upper electrode and the lower electrode overlap with the stage portion of the separation layer. By providing the separation layer, the light-emitting unit can be formed without using a metal mask. The upper electrode can be a composite material including an organic compound and a metal oxide or a stacked layer of the composite material and a metal material or a light-transmitting conductive material. | 08-16-2012 |
| 20120205676 | Light-Emitting Device and Display Device - A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is to the electrode having a reflective property, the longer the wavelength of light emitted from the light-emitting layer is. | 08-16-2012 |
| 20120205678 | Light-Emitting Device and Manufacturing Method Thereof, Lighting Device, and Display Device - In a light-emitting device, an insulating separation layer whose upper portion protrudes more than a bottom portion in a direction parallel to a substrate is provided on and in contact with a common wiring provided over the substrate. An EL layer provided over the separation layer on the common wiring is physically divided by the separation layer. An upper electrode layer formed in the same position is also physically divided by the separation layer and is in contact with the common wiring in a region overlapped with the most protruding portion of the separation layer. Such a common wiring may be used as an auxiliary wiring. Further, such a light-emitting device may be applied to a lighting device and a display device. | 08-16-2012 |
| 20120205679 | Light-Emitting Module, Light-Emitting Panel, and Lighting Device - An object is to provide a light-emitting module in which a light-emitting element suffering a short-circuit failure does not cause wasteful electric power consumption. Another object is to provide a light-emitting panel in which a light-emitting element suffering a short-circuit failure does not allow the reliability of an adjacent light-emitting element to lower. Focusing on heat generated by a light-emitting element suffering a short-circuit failure, provided is a structure in which electric power is supplied to a light-emitting element through a positive temperature coefficient thermistor (PTC thermistor) thermally coupled with the light-emitting element. | 08-16-2012 |
| 20120205685 | Light-Emitting Element, Light-Emitting Device, and Display Device - A light-emitting element with which a reduction in power consumption and an improvement in productivity of a display device can be achieved is provided. A technique of manufacturing a display device with high productivity is provided. The light-emitting element includes an electrode having a reflective property, and a first light-emitting layer, a charge generation layer, a second light-emitting layer, and an electrode having a light-transmitting property stacked in this order over the electrode having a reflective property. The optical path length between the electrode having a reflective property and the first light-emitting layer is one-quarter of the peak wavelength of the emission spectrum of the first light-emitting layer. The optical path length between the electrode having a reflective property and the second light-emitting layer is three-quarters of the peak wavelength of the emission spectrum of the second light-emitting layer. | 08-16-2012 |
| 20120205686 | Light-Emitting Device and Display Device - A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is. | 08-16-2012 |
| 20120205687 | LIGHT-EMITTING BODY, LIGHT-EMITTING LAYER, AND LIGHT-EMITTING DEVICE - An organic light-emitting element having high efficiency and long lifetime is provided. An organic light-emitting body is provided which includes a host having a high electron-transport property (n-type host), a host having a high hole-transport property (p-type host), and a guest such as an iridium complex and in which the n-type host and the p-type host are located so as to be adjacent to each other. When an electron and a hole are injected to such a light-emitting body, the electron is trapped by the n-type host and the hole is trapped by the p-type host. Then, both the electron and the hole are injected to the guest, and thus the guest is brought into an excited state. In this process, less thermal deactivation occurs and the working rate of the guest is high; thus, highly efficient light emission can be obtained. | 08-16-2012 |
| 20120205701 | Light-Emitting Element, Display Device, Lighting Device, and Method for Manufacturing the Same - A light-emitting element disclosed includes a first electrode layer; a second electrode layer which transmits light; and a light-emitting layer interposed between the first electrode layer and the second electrode layer. The first electrode layer includes a first conductive layer which is able to reflect light, a second conductive layer provided over the first conductive layer and including titanium, and a third conductive layer which transmits light and contains a metal oxide having work function higher than that of a material of the first conductive layer. | 08-16-2012 |
| 20120205702 | Light-Emitting Device - An organic EL light-emitting device with excellent total luminous flux or with reduced emission unevenness and low power consumption is provided. Light from an organic EL layer in a region sandwiched between a light-transmitting conductive film of a lower electrode and a light-reflecting conductive film of an upper electrode is selectively emitted to the lower electrode side, and extracted outside by a first optical structure body. Light from the organic EL layer in a region sandwiched between a light-reflecting conductive film of the lower electrode and a light-transmitting conductive film of the upper electrode is selectively emitted to the upper electrode side, and extracted outside by a second optical structure body. The first optical structure body and the second optical structure body are formed on different planes and can overlap with each other; thus, light from the organic EL layer can be efficiently extracted outside. | 08-16-2012 |
| 20120205709 | Light-Emitting Device and Lighting Device - A light-emitting device and a lighting device each including a light-emitting element which can recover from a short circuit between a pair of electrodes by itself without adversely affecting the characteristics of the element is provided. An oxide layer is provided so as to be in contact with an electrode of the light-emitting element, whereby, due to heat generated when a short circuit is caused between a pair of electrodes, oxygen in the oxide layer and an electrode material in a short-circuited part are reacted with each other and the electrode material in the short-circuited part can be an insulator. Further, by providing an oxide layer in contact with an electron-injection layer containing an alkaline earth metal, an oxide of the alkaline earth metal can be formed, whereby moisture that enters the insulator formed by an insulation phenomenon in the short-circuited part can be adsorbed and removed. | 08-16-2012 |
| 20120206031 | Lighting Device - The lighting device includes a substrate, a light-emitting element formed over one of surfaces of the substrate, and a rear surface metal layer formed on another surface of the substrate, which is opposite to the surface over which the light-emitting element is formed. The light-emitting element has a structure in which an organic compound layer containing a light-emitting substance is provided between a pair of electrodes. The substrate has a layered structure of an organic insulating layer and a metal layer including at least one internal metal layer. The internal metal layer is thermally bonded to the rear surface metal layer through a via hole formed in the organic insulating layer. The resistance of the via hole is lower than that in the case of thermal bonding not through the via hole. | 08-16-2012 |
| 20120206035 | LIGHT-EMITTING ELEMENT - Provided is a light-emitting element with high external quantum efficiency, or a light-emitting element with a long lifetime. The light-emitting element includes, between a pair of electrodes, a light-emitting layer including a guest material and a host material, in which an emission spectrum of the host material overlaps with an absorption spectrum of the guest material, and phosphorescence is emitted by conversion of an excitation energy of the host material into an excitation energy of the guest material. By using the overlap between the emission spectrum of the host material and the absorption spectrum of the guest material, the energy smoothly transfers from the host material to the guest material, so that the energy transfer efficiency of the light-emitting element is high. Accordingly, a light-emitting element with high external quantum efficiency can be achieved. | 08-16-2012 |
| 20120206675 | Light-Emitting Device and Electronic Device Using Light-Emitting Device - First to third light-emitting elements each including a reflection electrode layer, a transflective electrode layer, and a light-emitting layer provided therebetween are provided. In the first light-emitting element, the light-emitting layer is in contact with the reflection electrode layer and the transflective electrode layer. In the second light-emitting element, a first transparent electrode layer is in contact with the reflection electrode layer, the light-emitting layer is in contact with the first transparent electrode layer and the transflective electrode layer. In the third light-emitting element, a second transparent electrode layer is in contact with the reflection electrode layer, the light-emitting layer is in contact with the second transparent electrode layer and the transflective electrode layer. The first transparent electrode layer is different form the second transparent electrode layer in thickness. | 08-16-2012 |
| 20120217487 | Light-Emitting Device - A light-emitting element includes a light-emitting layer including a guest, an n-type host and a p-type host between a pair of electrodes, where the difference between the energy difference between a triplet excited state and a ground state of the n-type host (or p-type host) and the energy difference between a triplet excited state and a ground state of the guest is 0.15 eV or more. Alternatively, in such a light-emitting element, the LUMO level of the n-type host is higher than the LUMO level of the guest by 0.1 eV or more, or the HOMO level of the p-type host is lower than the HOMO level of the guest by 0.1 eV or more. | 08-30-2012 |
| 20120217516 | Light-Emitting Device and Electronic Device Using Light-Emitting Device - Provided is a highly reliable light-emitting device in which a light-emitting element is prevented from being damaged when external physical force is applied. The light-emitting device includes a light-emitting element formed over a first substrate, including a first electrode layer, a light-emitting layer, and a second electrode layer; a structure body formed over the first substrate; a second substrate provided to face the first substrate; and a bonding layer provided between the first substrate and the second substrate. The light-emitting layer is separated by the structure body. By strengthening adhesion between the structure body and the bonding layer, or between the structure body and the second electrode, the highly reliable light-emitting device in which damage of the light-emitting element is prevented can be provided. | 08-30-2012 |
| 20120223346 | Display Device - To provide a display device with low power consumption. The display device includes a plurality of pixels each having a light-emitting element having a structure in which light emitted from a light-emitting layer is resonated between a reflective electrode and a light-transmitting electrode, wherein no color filter layers are provided or color filter layers with high transmittance are provided in pixels for light with relatively short wavelengths (e.g., pixels for blue and/or green), and a color filter layer is selectively provided in pixels for light with a long wavelength (e.g., pixels for red), and thereby maintaining color reproducibility and consuming less power. | 09-06-2012 |
| 20120228657 | Light-Emitting Element and Light-Emitting Device - To provide a light-emitting element or a light-emitting device in which power is not consumed wastefully even if a short-circuit failure occurs. The present invention focuses on heat generated due to a short-circuit failure which occurs in a light-emitting element. A fusible alloy which is melted at temperature T | 09-13-2012 |
| 20120237669 | Successive Deposition Apparatus and Successive Deposition Method - A successive deposition apparatus by which a reduction in the luminous efficiency of a light-emitting element can be suppressed even in high-speed deposition of a light-emitting layer thereof is provided. The apparatus includes: a second deposition chamber; a third deposition chamber coupled to the second deposition chamber; a transfer unit for transferring a substrate from second deposition chamber to third deposition chamber; plural third deposition sources arranged in the substrate transfer direction in the second deposition chamber; and a fourth and fifth deposition sources alternately arranged in the transfer direction in the third deposition chamber. In the third deposition chamber, the fourth deposition source is placed nearest to the second deposition source. The fourth deposition source contains a host material, and the fifth deposition source contains a dopant material. The HOMO level of a material of the third deposition source is adjusted to that of the host material. | 09-20-2012 |
| 20120241727 | COMPOSITE MATERIAL, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A composite material which includes an organic compound and an inorganic compound and has a high carrier-transport property is provided. A composite material having a good property of carrier injection into an organic compound is provided. A composite material in which light absorption due to charge-transfer interaction is unlikely to occur is provided. A composite material having a high visible-light-transmitting property is provided. A composite material including a hydrocarbon compound and an inorganic compound exhibiting an electron-accepting property with respect to the hydrocarbon compound is provided. The hydrocarbon compound has a substituent bonded to a naphthalene skeleton, a phenanthrene skeleton, or a triphenylene skeleton and has a molecular weight of 350 to 2000, and the substituent has one or more rings selected from a benzene ring, a naphthalene ring, a phenanthrene ring, and a triphenylene ring. | 09-27-2012 |
| 20120241794 | Light-Emitting Device and Lighting Device - To improve power efficiency of a light-emitting element for white emission even when light in a wavelength range of low luminosity is utilized. As a light-emitting element for white emission, three light-emitting layers are stacked. In such a light-emitting element, the three light-emitting layers are included between a light-transmitting electrode and a light-reflecting electrode, and light emitted from each light-emitting layer is reflected on the light-reflecting electrode and is transmitted through the light-transmitting electrode. In addition, the light-emitting layer closer to the light-reflecting electrode has a shorter optical path length. Thus, the position of each light-emitting layer is limited depending on the distance from the light-reflective electrode, and the optical path length of each light-emitting layer is adjusted; therefore the light-emitting element with high power efficiency can be provided. | 09-27-2012 |
| 20120242219 | LIGHT-EMITTING ELEMENT - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having low drive voltage is provided. Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound. | 09-27-2012 |
| 20120243219 | Light-Emitting Panel, Light-Emitting Device, and Method for Manufacturing the Light-Emitting Panel - A light-emitting panel can be manufactured in which a first light-emitting element emits light having high brightness and a pale color and causing less eyestrain even in the case of long time, a second light-emitting element emits light of a bright red color, a third light-emitting element emits green light, and a fourth light-emitting element emits blue light. Further, a layer transmitting light of a specific color (e.g., a color filter) is not provided in all the light-emitting elements except the second light-emitting element; thus, light emitted from the layer containing a light-emitting organic compound can be efficiently used. As a result, a light-emitting panel which is capable of bright, full-color light emission and whose power consumption is reduced can be provided. | 09-27-2012 |
| 20120248421 | LIGHT-EMITTING ELEMENT - A light-emitting element having extremely high efficiency of approximately 25% is provided. The light-emitting element includes a light-emitting layer which contains a phosphorescent guest, an n-type host, and a p-type host, where the light-emitting layer is interposed between an n-type layer including the n-type host and a p-type layer including the p-type host, and where the n-type host and the p-type host are able to form an exciplex in the light-emitting layer. The light-emitting element exhibits an extremely high emission efficiency (power efficiency of 74.3 lm/W, external quantum efficiency of 24.5%, energy efficiency of 19.3%) at a low driving voltage (2.6 V) at which luminance of 1200 cd/m | 10-04-2012 |
| 20120248969 | Organometallic Complex, Light-Emitting Element, Display Device, Electronic Device, and Lighting Device - An organometallic complex which can emit phosphorescence is provided. The organometallic complex, which is a novel substance, is represented by General Formula (G1) or General Formula (G2). In General Formula (G1), R | 10-04-2012 |
| 20120256535 | LIGHT-EMITTING ELEMENT - To provide a light-emitting element with high emission efficiency or long lifetime, in which the use amount of a phosphorescent compound is small. To provide a light-emitting element including a light-emitting layer between a pair of electrodes, wherein the light-emitting layer includes a phosphorescent compound, a first organic compound, and a second organic compound, and the combination of the first organic compound and the second organic compound forms an exciplex. The light-emitting element transfers energy by utilizing the overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency, even when the concentration of the phosphorescent compound is low. | 10-11-2012 |
| 20120264936 | Organic Light-Emitting Element, Organometallic Complex, Light-Emitting Device, Electronic Appliance, and Lighting Device - Disclosed is a phosphorescent organometallic complex having: a 6-membered aromatic heterocycle having a nitrogen atom; iridium or platinum to which the nitrogen atom coordinates; and an aryl group which is bonded to an α-carbon of the nitrogen atom and is ortho-metalated with the iridium or platinum, where at least one of the aromatic heterocycle and the aryl group has an alicyclic hydrocarbon having an intramolecular carbon-carbon bridged bond as a substituent. The ability of the bulky structure of the alicyclic hydrocarbon to inhibit aggregation of the organometallic complex, concerted with the strong electron-donating property of the alicyclic hydrocarbon to the aromatic heterocycle or the aryl group, contributes to the increase in absorption coefficient and phosphorescent efficiency of the organometallic complex. The improved absorption coefficient and the phosphorescent efficiency allow the formation of a light-emitting element with excellent external quantum efficiency over 25%. | 10-18-2012 |
| 20120273822 | Light-Emitting Element, Light-Emitting Device, and Lighting Device - Disclosed is a light-emitting element with a microcavity structure which is capable of amplifying a plurality of wavelengths to give emission of a desired color. The light-emitting element includes a pair of electrodes and an EL layer having a light-emitting substance interposed between the pair of electrodes. One of the pair of electrodes gives a reflective surface and the other electrode gives a semi-reflective surface. The light-emitting element is arranged so that the emission of the light-emitting substance covers at least two wavelengths λ and an optical path length L between the reflective surface and the semi-reflective surface satisfies an equation L=nλ/2 where n is an integer greater than or equal to 2. | 11-01-2012 |
| 20120274201 | Light-Emitting Device, Electronic Device, and Lighting Device Utilizing Phosphorescence - A new light-emitting device utilizing phosphorescence is provided. Further, an electronic device and a lighting device which utilize phosphorescence are provided. One embodiment of the present invention is a light-emitting device including a phosphorescent organometallic iridium complex comprising iridium and either pyrimidine having an aryl group at the 4-position or 1,3,5-triazine having an aryl group at the 2-position. One of nitrogen in the pyrimidine or 1,3,5-triazine is coordinated to the iridium. Also, each of the pyrimidine and 1,3,5-triazine has a substituent such as an alkyl group or an aryl group. Further the ortho position of the aryl group which is bonded to the 4-position of the pyrimidine or the 2-position of the 1,3,5-triazine is bonded to the iridium. | 11-01-2012 |
| 20120277427 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel organometallic complex which can emit phosphorescence is provided. A light-emitting element, a light-emitting device, an electronic device, or a lighting device with high emission efficiency is provided. The organometallic complex having an aryl triazine derivative as a ligand is represented by General Formula (G1) below as a representative of the organometallic complex of the present invention. | 11-01-2012 |
| 20120286252 | Light-Emitting Element and Light-Emitting Device - Provided are a light-emitting element capable of reducing power consumption by increasing its light extraction efficiency and a light-emitting device using the light-emitting element. A light-emitting element includes a composite material, which contains an organic compound having a high hole-transport property and an electron acceptor and in which the spin density measured by an electron spin resonance (ESR) method is less than or equal to 1×10 | 11-15-2012 |
| 20120289708 | Carbazole Compound, Light-Emitting Element Material, and Organic Semiconductor Material - A novel carbazole compound that can be used for a transport layer, a host material, or a light-emitting material in a light-emitting element. In the carbazole compound, two carbazole skeletons each include carbazole, the 3-position of which is bonded to the 4-position of a dibenzofuran skeleton or a dibenzothiophene skeleton and these two carbazole skeletons are linked via benzene or biphenyl. The carbazole compound has an excellent carrier-transport property and a wide energy gap and can be suitably used for a material in a light-emitting element or for an organic semiconductor material. | 11-15-2012 |
| 20120305896 | Organometallic Complex, Organic Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel and highly reliable organometallic complex which has an emission region in the wavelength band of blue to yellow is provided. A light-emitting element using the organometallic complex, a light-emitting device, an electronic device, and a lighting device each using the light-emitting element are provided. An organometallic complex including a structure represented by General Formula (G1) is provided. The organometallic complex including the structure represented by General Formula (G1) is a novel and highly reliable organometallic complex which has an emission region in the wavelength band of blue to yellow. In addition, a light-emitting element using the organometallic complex, a light-emitting device, an electronic device, and a lighting device each including the light-emitting element are provided. | 12-06-2012 |
| 20130002131 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An organometallic complex emitting blue phosphorescence which can be manufactured inexpensively is provided. An organometallic complex in which nitrogen at the 1-position of a 5-aryl-4H-1,2,4-triazole derivative is coordinated to a Group 9 metal or a Group 10 metal, the aryl group is bonded to the Group 9 metal or the Group 10 metal, and the 5-aryl-4H-1,2,4-triazole derivative is a 3-aryl-5,6,7,8-tetrahydro-4H-[1,2,4]triazolo[4,3-a]pyridine derivative is provided. The organometallic complex emits green to blue phosphorescence and has a cost advantage. | 01-03-2013 |
| 20130009138 | COMPOSITE MATERIAL, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, AND ORGANIC COMPOUND - A composite material including an organic compound and an inorganic compound, which has a high carrier-transport property; a composite material having an excellent property of carrier injection to an organic compound; a composite material in which light absorption due to charge transfer interaction is unlikely to occur; and a composite material having a high visible-light-transmitting property are provided. A composite material which includes an organic compound and an inorganic compound exhibiting an electron-accepting property with respect to the organic compound, in which the rings of the organic compound are all benzene rings and the number of the benzene rings of the organic compound is greater than or equal to 4 and less than or equal to 25, is provided. | 01-10-2013 |
| 20130009194 | LIGHT-EMITTING MODULE, LIGHT-EMITTING DEVICE, AND METHOD FOR MANUFACTURING THE LIGHT-EMITTING MODULE - A highly reliable light-emitting module or light-emitting device is provided. A method for manufacturing a highly reliable light-emitting module is provided. The light-emitting module includes, between a first substrate and a second substrate, a first electrode provided over the first substrate, a second electrode provided over the first electrode with a layer containing a light-emitting organic compound interposed therebetween, and a sacrifice layer formed using a liquid material provided over the second electrode. | 01-10-2013 |
| 20130009543 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - Provided is a novel heterocyclic compound which can be used as a host material for dispersing a light-emitting material in a light-emitting layer of a light-emitting element. Further provided is a light-emitting element which is driven at a low voltage and has high current efficiency. By including the light-emitting element, a light-emitting device, an electronic device, and a lighting device each with reduced power consumption are provided. The light-emitting element contains a compound in which a dibenzo[f,h]quinoline ring and a hole-transport skeleton are bonded through an arylene group. The light-emitting device, the electronic device, and the lighting device each including the light-emitting element are provided. The light-emitting element contains a heterocyclic compound having a structure represented by the following general formula (G1). | 01-10-2013 |
| 20130020561 | Dibenzo[c,g]Carbazole Compound, Light-Emitting Element, Light-Emitting Device, Display Device, Lighting Device and Electronic Device - Provided is a novel compound which can be used for a transport layer or as a host material or a light-emitting material in a light-emitting element and with which a high-performance light-emitting element can be manufactured. A dibenzo[c,g]carbazole compound in which an aryl group having 14 to 30 carbon atoms and including at least anthracene is bonded to nitrogen of a dibenzo[c,g]carbazole derivative is synthesized. By use of the dibenzo[c,g]carbazole compound, a light-emitting element having very good characteristics can be obtained. | 01-24-2013 |
| 20130048964 | Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Novel Organic Compound - A light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and the second compound is an organic compound having a pyrimidine skeleton. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a diazine skeleton, and the second compound is an organic compound having a pyrimidine skeleton. | 02-28-2013 |
| 20130048995 | Light-Emitting Module, Light-Emitting Device, Method of Manufacturing the Light-Emitting Module, and Method of Manufacturing the Light-Emitting Device - A highly reliable light-emitting module including an organic EL element or a light-emitting device using a highly reliable light-emitting module including an organic EL element is provided. Alternatively, a method of manufacturing a highly reliable light-emitting module including an organic EL element, or a method of manufacturing a light-emitting device using a highly reliable light-emitting module including an organic EL element is provided. The light-emitting module has a structure in which a light-emitting element formed over a first substrate and a viscous material layer are sealed in a space between the first substrate and a second substrate which face each other, with a sealing material surrounding the light-emitting element. The viscous material layer is provided between the light-emitting element and the second substrate and includes a non-solid material and a drying agent which reacts with or adsorbs an impurity. | 02-28-2013 |
| 20130060033 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, AND HETEROCYCLIC COMPOUND - Provided is a novel heterocyclic compound which has excellent heat resistance and can be used as a host material for a light-emitting substance (a substance emitting fluorescence or a substance emitting phosphorescence). A light-emitting element includes a heterocyclic compound which includes one dibenzo[f,h]quinoxaline ring, one ring having a hole-transport skeleton, and two to eight benzene rings. Note that in the above structure, the molecular weight of the heterocyclic compound is greater than or equal to 564 and less than or equal to 1000. | 03-07-2013 |
| 20130082591 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - To provide a novel heterocyclic compound that can be used as a host material in which a light-emitting substance of a light-emitting layer is dispersed. A heterocyclic compound comprising a dibenzo[f,h]quinoxaline ring and two hole-transport skeletons, where the dibenzo[f,h]quinoxaline ring and the two hole-transport skeletons are bonded to an aromatic hydrocarbon group. A heterocyclic compound represented by the following general formula (G1) is provided. | 04-04-2013 |
| 20130087773 | Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Pyrene-Based Compound - A highly efficient light-emitting element capable of providing a plurality of emission colors is provided, which does not easily deteriorate and can minimize a decrease in external quantum efficiency even when a light-emitting layer has a stacked structure. A light-emitting device, an electronic device, and a lighting device which have low power consumption and long lifetime are provided. A light-emitting element includes a plurality of light-emitting layers stacked between a pair of electrodes. The light-emitting layers each contain a host material and a guest material. The guest materials of the light-emitting layers are substances which have different HOMO levels but have substantially the same LUMO levels and emit light of different colors. A light-emitting device, an electronic device, and a lighting device are fabricated using the light-emitting element. | 04-11-2013 |
| 20130088144 | Phosphorescent Iridium Metal Complex, Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - Provided is a light-emitting element including a phosphorescent iridium metal complex that emits phosphorescence in a yellow green to orange wavelength range, and has high emission efficiency and reliability. Thus, further provided is the phosphorescent iridium metal complex that emits phosphorescence in the yellow green to orange wavelength range. Further provided are a light-emitting device, an electronic appliance, and a lighting device each of which includes the above light-emitting element. The light-emitting element includes an EL layer between a pair of electrodes, and the EL layer contains a phosphorescent iridium metal complex where nitrogen at the 3-position of a pyrimidine ring having an aryl group bonded to the 4-position is coordinated to a metal, a substituent having a carbazole skeleton is bonded to the 6-position of the pyrimidine ring, and the aryl group bonded to the 4-position of the pyrimidine ring is ortho-metalated by being bonded to the metal. | 04-11-2013 |
| 20130134395 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE AND ORGANIC COMPOUND - A novel organic compound which can be used as a host material for a phosphorescent compound is provided. A light-emitting element containing the organic compound is provided. A light-emitting device, an electronic device, and a lighting device each of which includes the light-emitting element are provided. In the light-emitting element including a light-emitting layer interposed between a pair of electrodes, the light-emitting layer contains at least an organic compound and a phosphorescent compound. In the organic compound, a dibenzo[f,h]quinoxaline skeleton and an amino group having two substituents are bonded to each other through an arylene group. The substituents are separately an aryl group or a heteroaryl group. | 05-30-2013 |
| 20130137866 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, a novel organometallic complex that can emit phosphorescence in the green to red wavelength region and has high emission efficiency and a high yield of synthesis is provided. One embodiment of the present invention is an organometallic complex in which a diketone having a five-membered or six-membered alicyclic structure composed of carbon and hydrogen is a ligand. | 05-30-2013 |
| 20130161598 | Iridium Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A tris-type iridium complex in which a ligand having a distinctive nitrogen-containing five-membered heterocyclic skeleton is coordinated is provided. The ligand has a nitrogen-containing five-membered heterocyclic skeleton composed of 2 to 4 nitrogen atoms and one or more carbon atoms. In the skeleton, an aryl group is bonded to a carbon atom on both sides of which nitrogen atoms are positioned, and a tricycloalkyl group having a bridge structure and having 9 or 10 carbon atoms is bonded to one of the two nitrogen atoms positioned on both the sides of the carbon atom. The tricycloalkyl group having a bridge structure and having 9 or 10 carbon atoms may be an adamantyl group or a noradamantyl group. | 06-27-2013 |
| 20130165653 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, an organometallic complex with high emission efficiency which achieves improved color purity by a reduction of half width of an emission spectrum is provided. One embodiment of the present invention is an organometallic complex in which a β-diketone and a six-membered heteroaromatic ring including two or more nitrogen atoms inclusive of a nitrogen atom that is a coordinating atom are ligands. In General Formula (G1), X represents a substituted or unsubstituted six-membered heteroaromatic ring including two or more nitrogen atoms inclusive of a nitrogen atom that is a coordinating atom. Further, R | 06-27-2013 |
| 20130207088 | Light-Emitting Element - Provided is a light-emitting element with high external quantum efficiency and a low drive voltage. The light-emitting element includes a light-emitting layer which contains a phosphorescent compound and a material exhibiting thermally activated delayed fluorescence between a pair of electrodes, wherein a peak of a fluorescence spectrum and/or a peak of a phosphorescence spectrum of the material exhibiting thermally activated delayed fluorescence overlap(s) with a lowest-energy-side absorption band in an absorption spectrum of the phosphorescent compound, and wherein the phosphorescent compound exhibits phosphorescence in the light-emitting layer by voltage application between the pair of electrodes. | 08-15-2013 |
| 20130214260 | Bipyridine Compound, Light-Emitting Element Material, Organic Semiconductor Material, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Lighting Device, Display Device and Electronic Device - A light-emitting element having good characteristics can be obtained by using a bipyridine compound having at least one 2,2′-bipyridine structure and at least two anthracene skeletons as light-emitting element materials. In particular, a bipyridine compound in which an anthracene skeleton is bonded to each of the 5-position and the 6-position of 2,2′-bipyridine through an arylene group can be synthesized and a light-emitting element having good characteristics can be obtained in the case where the bipyridine compound is used as a light-emitting element material. | 08-22-2013 |
| 20130221278 | PHOSPHORESCENT ORGANOMETALLIC IRIDIUM COMPLEX, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A novel phosphorescent organometallic iridium complex is provided in which a coordination position of a ligand with respect to a metal can be controlled in synthesis. A novel phosphorescent organometallic iridium complex is provided which can keep high quantum efficiency and can emit phosphorescence in the blue to green wavelength region. A phosphorescent organometallic iridium complex which includes a structure represented by General Formula (G1) and whose ligand is a 4H-1,2,4-triazole compound which has an unsubstituted phenyl group at the 3-position, a substituted or unsubstituted phenyl group at the 4-position, and a phenyl group at the 5-position. In the phenyl group at the 5-position, an alkyl group is bonded to at least one of the ortho-positions, and the other of the ortho-positions, the meta-positions, and the para-position are substituted or unsubstituted. | 08-29-2013 |
| 20130240851 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex. | 09-19-2013 |
| 20130240933 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - An object is to provide a light-emitting element which uses a plurality of kinds of light-emitting dopants and has high emission efficiency. In one embodiment of the present invention, a light-emitting device, a light-emitting module, a light-emitting display device, an electronic device, and a lighting device each having reduced power consumption by using the above light-emitting element are provided. Attention is paid to Förster mechanism, which is one of mechanisms of intermolecular energy transfer. Efficient energy transfer by Förster mechanism is achieved by making an emission wavelength of a molecule which donates energy overlap with a local maximum peak on the longest wavelength side of a graph obtained by multiplying an absorption spectrum of a molecule which receives energy by a wavelength raised to the fourth power. | 09-19-2013 |
| 20130256637 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - Provided is a light-emitting element with a small degree of luminance degradation with accumulation of driving time (a long-lifetime light-emitting element). Provided is a light-emitting element in which a light-emitting layer with an electron-transport property is formed with a plurality of layers containing different host materials. Further, the LUMO level of a host material on an anode side is higher than the LUMO level of a host material on a cathode side. With such a structure, it is possible to provide a long-lifetime light-emitting element with little degradation in luminance with accumulation of driving time. | 10-03-2013 |
| 20130270531 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting layer, which is a stack of a first light-emitting layer and a second light-emitting layer, is provided between an anode and a cathode. The first light-emitting layer is formed on the anode side and contains a first light-emitting substance converting triplet excitation energy into light emission, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property. The second light-emitting layer contains a second light-emitting substance converting triplet excitation energy into light emission, the first organic compound, and a third organic compound having a hole-transport property. The second organic compound has a lower HOMO level than the third organic compound. The first light-emitting substance emits light with a wavelength shorter than that of light emitted from the second light-emitting substance. The first and the second organic compounds form an exciplex. The first and the third organic compounds form an exciplex. | 10-17-2013 |
| 20130277653 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved; a light-emitting element including the organic compound; and a light-emitting device, an electronic device, and a lighting device each including the light-emitting element. The light-emitting element includes a hole-transport layer and a light-emitting layer between a pair of electrodes. At least one of the hole-transport layer and the light-emitting layer includes an organic compound having a skeleton represented by General Formula (G0). | 10-24-2013 |
| 20130277654 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - An object is to provide a light-emitting element which uses a plurality of kinds of light-emitting dopants and has high emission efficiency. In one embodiment of the present invention, a light-emitting device, a light-emitting module, a light-emitting display device, an electronic device, and a lighting device each having reduced power consumption by using the above light-emitting element are provided. Attention is paid to Förster mechanism, which is one of mechanisms of intermolecular energy transfer. Efficient energy transfer by Förster mechanism is achieved by making an emission wavelength of a molecule which donates energy overlap with the longest-wavelength-side local maximum peak of a graph obtained by multiplying an absorption spectrum of a molecule which receives energy by a wavelength raised to the fourth power. | 10-24-2013 |
| 20130277655 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element which has low driving voltage and high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an electron-transport property, a second organic compound having a hole-transport property, and a light-emitting third organic compound converting triplet excitation energy into light emission. A combination of the first organic compound and the second organic compound forms an exciplex. The hole-transport layer contains at least a fourth organic compound whose HOMO level is lower than or equal to that of the second organic compound and a fifth organic compound whose HOMO level is higher than that of the second organic compound. | 10-24-2013 |
| 20130277656 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element which has low driving voltage and high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an electron-transport property, a second organic compound having a hole-transport property, and a light-emitting third organic compound converting triplet excitation energy into light emission. A combination of the first organic compound and the second organic compound forms an exciplex. The hole-transport layer is formed using two or more kinds of organic compounds and contains at least the second organic compound. | 10-24-2013 |
| 20130281693 | Phosphorescent Organometallic Iridium Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, provided is a novel phosphorescent organometallic iridium complex that can emit phosphorescence in a blue green to red wavelength region and has high emission efficiency. The phosphorescent organometallic iridium complex has a ligand having a pyridyl pyrimidine skeleton, i.e., the phosphorescent organometallic iridium complex has a ligand having a structure represented by the following general formula (G0). | 10-24-2013 |
| 20130292656 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting layer, which is a stack of a first light-emitting layer and a second light-emitting layer, is provided between an anode and a cathode. The first light-emitting layer is formed on the anode side and contains a first light-emitting substance converting triplet excitation energy into light emission, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property. The second light-emitting layer contains a second light-emitting substance converting triplet excitation energy into light emission, the second organic compound, and a third organic compound having an electron-transport property. The first organic compound has a higher LUMO level than the third organic compound. The first light-emitting substance emits light with a wavelength shorter than that of light emitted from the second light-emitting substance. The first and the second organic compounds form an exciplex. The second and the third organic compounds form an exciplex. | 11-07-2013 |
| 20130299797 | Light-Emitting Device, Lighting Device, and Manufacturing Method of Light-Emitting Device - It is an object to provide a light-emitting device which has high power efficiency and high light-extraction efficiency and emits light uniformly in a plane. It is another object to provide a manufacturing method of the light-emitting device. It is another object to provide a lighting device including the light-emitting device. One embodiment of the present invention provides a light-emitting device which includes: a first electrode provided over a substrate; a layer containing a light-emitting organic compound provided over the first electrode; an island-shaped insulating layer provided over the layer containing the light-emitting organic compound; an island-shaped auxiliary electrode layer provided over the island-shaped insulating layer; and a second electrode having a property of transmitting visible light provided over the layer containing the light-emitting organic compound and the island-shaped auxiliary electrode layer. | 11-14-2013 |
| 20130306945 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - An object is to provide a light-emitting element which includes an exciplex being used as an energy donor capable of efficiently transferring energy to a substance exhibiting thermally activated delayed fluorescence. The exciplex comprises two kinds of substances and its singlet and triplet excited states are close to each other. Thus, by making light emission of the exciplex overlap with an absorption band on the longest wavelength side which corresponds to absorption by the substance exhibiting thermally activated delayed fluorescence, i.e., an energy acceptor, in a singlet excited state, it becomes possible to achieve efficient energy transfer from a singlet excited state of the exciplex to a singlet excited state of the substance exhibiting thermally activated delayed fluorescence, and it also becomes possible to achieve efficient energy transfer from a triplet excited state of the exciplex to a triplet excited state of the substance exhibiting thermally activated delayed fluorescence. | 11-21-2013 |
| 20130320368 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - Disclosed is a light-emitting element comprising a plurality of light-emitting units which are separated from one another by a charge generation layer. The light-emitting units each have a light-emitting layer which is featured by a stack of two layers. Each of the two layers includes a host material and a phosphorescent material where the phosphorescent material in one of the two layers is blue emissive while the phosphorescent material in the other of the two layers exhibits a maximum emission peak in a range from 500 nm to 700 nm. The phosphorescent material exhibiting a maximum emission peak in a range from 500 nm to 700 nm may be different from light-emitting unit to light-emitting unit. An additive may be included in at least one of the two layers so that an exciplex is formed with the host material. | 12-05-2013 |
| 20130320377 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - An object is to provide a light-emitting element which uses a plurality of kinds of light-emitting dopants and has high emission efficiency. In one embodiment of the present invention, a light-emitting device, a light-emitting module, a light-emitting display device, an electronic device, and a lighting device each having reduced power consumption are provided by using the above light-emitting element. Focus is placed on Förster mechanism, which is one of mechanisms of intermolecular energy transfer. Efficient energy transfer by Förster mechanism is achieved by employing a combination of molecules which makes it possible to obtain an overlap between an emission spectrum band of the molecule which donates energy and the longest-wavelength-side peak of a characteristic curve obtained by multiplying an absorption spectrum of the molecule which receives energy by a wavelength raised to the fourth power. | 12-05-2013 |
| 20130323869 | Organic Material, Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A novel organic material with fewer impurities, a light-emitting element including the organic material, and a light-emitting device, an electronic appliance, and a lighting device each of which includes the light-emitting element are provided. The organic material is obtained by coupling an aryl halide and an aryl boronic acid or an aryl boronic acid ester. The aryl boronic acid or the aryl boronic acid ester includes at least one of a first impurity in which a boryl group of the aryl boronic acid or the aryl boronic acid ester is substituted by hydrogen and a second impurity in which a molecular mass of 16 or 17 is added to the molecular mass of the first impurity. The concentration of an impurity other than the first impurity and the second impurity is 1% or lower. | 12-05-2013 |
| 20130324721 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided are a light-emitting element including a novel organometallic complex as an emission center, the organometallic complex, a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. One embodiment of the present invention is a light-emitting element including, as an emission center, an organometallic complex in which a benzofuropyrimidine derivative is coordinated to a metal. In particular, another embodiment is a light-emitting element including, as an emission center, an organometallic complex in which a benzofuropyrimidine derivative having an aryl group at the 4-position is coordinated to a metal. Another embodiment is a light-emitting element including, as an emission center, an organometallic complex in which nitrogen at the 3-position of a benzofuropyrimidine derivative having an aryl group at the 4-position is coordinated to a metal and the aryl group is bonded to the metal. | 12-05-2013 |
| 20130324729 | Method of Synthesizing Pyrazine Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel method in which a pyrazine derivative is synthesized without a synthetic pathway of a pyrazine halide derivative, which is a synthetic intermediate, whose pytazine skeleton is halogenated is provided. Furthermore, a light-emitting element, a light-emitting device, an electronic device, or a lighting device with high emission efficiency by using a pyrazine derivative obtained by the above synthesizing method as an EL material is provided. In the method, a pyrazine derivative is synthesized without a synthetic pathway of a pyrazine halide derivative, which is a synthetic intermediate, whose pytazine skeleton is halogenated. Specifically, a 2-arylpyrazine derivative having an aryl group or a heteroaryl group as a substituent is synthesized. | 12-05-2013 |
| 20140014930 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved is provided. The organic compound has an imidazo[1,2-f]phenanthridine skeleton and a dibenzothiophene skeleton or a dibenzofuran skeleton bonded through an arylene group. The light-emitting element including the organic compound in a light-emitting layer shows high efficiency and low power consumption. | 01-16-2014 |
| 20140034924 | Heterocyclic Compound and Light-Emitting Device, Display Device, Lighting Device, and Electronic Device Using the Same - Provided is a compound having an indolo[3,2,1-jk]carbazole skeleton and a heterocyclic skeleton which are bonded to each other through an arylene group. The heterocyclic skeleton contains an imidazole skeleton, a pyrazine skeleton, a pyrimidine skeleton, a triazole skeleton, or a condensed heteroaromatic ring including any of these heterocycles. The high carrier-transport property and the large band gap of the compound allows the used as a host material of a phosphorescent dopant, leading to the formation of a green to blue emissive phosphorescent light-emitting element having high emission efficiency, low driving voltage, and reduced power consumption. | 02-06-2014 |
| 20140034925 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element with low drive voltage, a light-emitting element with high current efficiency, and/or a light-emitting element with a long lifetime are/is provided. Specifically, a light-emitting element with low drive voltage, a light-emitting element with high current efficiency, and/or a light-emitting element with a long lifetime are/is provided by the use of an organic compound with a dibenzo[f,h]quinoxaline skeleton in a light-emitting layer. In a light-emitting element which includes a light-emitting layer containing an organic compound between a pair of electrodes, the organic compound has a 2,3-unsubstituted dibenzo[f,h]quinoxaline skeleton, a hole-transport skeleton selected from a substituted or unsubstituted dibenzothiophene skeleton, a substituted or unsubstituted dibenzofuran skeleton, and a substituted or unsubstituted carbazole skeleton, and an arylene skeleton, and the 2,3-unsubstituted dibenzo[f,h]quinoxaline skeleton and the hole-transport skeleton are bonded through the arylene skeleton. | 02-06-2014 |
| 20140034926 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - A multicolor light-emitting element in which light-emitting layers emitting light of different colors are stacked and color adjustment is easily made is provided. A multicolor light-emitting element which is inexpensive and has favorable emission efficiency is provided. A light-emitting element in which at least two light-emitting layers emitting light of different colors are formed in contact with each other and the light emitted from the two light-emitting layers is obtained from exciplexes is provided. In addition, the light-emitting element in which the exciplexes emit delayed fluorescence is provided. | 02-06-2014 |
| 20140034927 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - A multicolor light-emitting element using fluorescence and phosphorescence, which has a small number of manufacturing steps owing to a relatively small number of layers to be formed and is advantageous for practical application can be provided. In addition, a multicolor light-emitting element using fluorescence and phosphorescence, which has favorable emission efficiency is provided. A light-emitting element which includes a light-emitting layer having a stacked-layer structure of a first light-emitting layer exhibiting light emission from a first exciplex and a second light-emitting layer exhibiting phosphorescence is provided. | 02-06-2014 |
| 20140034928 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel organic compound having a high hole-transport property is provided. A long-lifetime light-emitting element is provided. An organic compound represented by General Formula (G0) is provided. In General Formula (G0), Ar | 02-06-2014 |
| 20140034929 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar | 02-06-2014 |
| 20140034930 | Light-Emitting Element - To provide a light-emitting element which uses a fluorescent material as a light-emitting substance and has higher luminous efficiency. To provide a light-emitting element which includes a mixture of a thermally activated delayed fluorescent substance and a fluorescent material. By making the emission spectrum of the thermally activated delayed fluorescent substance overlap with an absorption band on the longest wavelength side in absorption by the fluorescent material in an S | 02-06-2014 |
| 20140034931 | Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Heterocyclic Compound - A light-emitting element with high heat resistance and high emission efficiency is provided. A novel heterocyclic compound that can be used in such a light-emitting element is provided. One embodiment of the present invention is a light-emitting element which includes, between a pair of electrodes, a layer containing a first organic compound, a second organic compound, and a light-emitting substance; the first organic compound includes one pyrimidine ring and one ring with a hole-transport skeleton; the second organic compound is an aromatic amine; and the light-emitting substance converts triplet excitation energy into light. A combination of the first organic compound, which includes the one pyrimidine ring and the one ring with the hole-transport skeleton, and the second organic compound, which is the aromatic amine, forms an exciplex. | 02-06-2014 |
| 20140034932 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - The light-emitting element has a structure in which a first organic compound and a second organic compound form an exciplex (excited complex) in a light-emitting layer. The S1 level and the T1 level of the formed exciplex are positioned extremely close to each other compared to the S1 level and the T1 level of the respective substances (the first organic compound and the second organic compound) before the formation of the exciplex. | 02-06-2014 |
| 20140042469 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - A light-emitting element which uses a plurality of kinds of light-emitting dopants emitting light in a balanced manner and has high emission efficiency is provided. Further, a light-emitting device, a display device, an electronic device, and a lighting device each having reduced power consumption by using the above light-emitting element are provided. A light-emitting element which includes a plurality of light-emitting layers including different phosphorescent materials is provided. In the light-emitting element, the light-emitting layer which includes a light-emitting material emitting light with a long wavelength includes two kinds of carrier-transport compounds having properties of transporting carriers with different polarities. Further, in the light-emitting element, the triplet excitation energy of a host material included in the light-emitting layer emitting light with a short wavelength is higher than the triplet excitation energy of at least one of the carrier-transport compounds. | 02-13-2014 |
| 20140046073 | Oxadiazole Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device Using the Oxadiazole Derivative - An object of one embodiment of the present invention is to provide a novel oxadiazole derivative as a substance having high excitation energy, in particular, a substance having high triplet excitation energy. One embodiment of the present invention is an oxadiazole derivative represented by General Formula (G1) below. | 02-13-2014 |
| 20140061604 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting layer is provided between a pair of electrodes. The light-emitting layer is a stack of a first light-emitting layer, which contains a first phosphorescent compound, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property and is provided on the anode side, and a second light-emitting layer, which contains at least a second phosphorescent compound and the first organic compound having an electron-transport property. A combination of the first organic compound and the second organic compound forms an exciplex. | 03-06-2014 |
| 20140066633 | ORGANIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R | 03-06-2014 |
| 20140084274 | Light-Emitting Element - A light-emitting element with high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a layer containing a p-type host, a light-emitting layer containing a guest, the p-type host, and an n-type host, and a layer containing the n-type host. A combination of the p-type host and the n-type host forms an exciplex. Among the layer containing the p-type host, the light-emitting layer, and the layer containing the n-type host, the light-emitting layer has the highest secondary ion intensity of the n-type host, the layer containing the n-type host has the second-highest secondary ion intensity of the n-type host, and the layer containing the p-type host has the lowest secondary ion intensity of the n-type host in analysis by a time-of-flight secondary ion mass spectrometer. | 03-27-2014 |
| 20140091293 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - Provided is a light-emitting element in which an adverse effect by halides in an EL layer is suppressed and which can be provided with low cost. The light-emitting element including at least two layers between an anode and a light-emitting layer. One of the two layers which is closer to the anode has higher concentration of halides and halogen elements than the other layer closer to the light-emitting layer. | 04-03-2014 |
| 20140091342 | Lighting Device - A lighting device using an electroluminescent material, in which color mixing and dimming can be performed by a simple method, is provided. A lighting device including a first light-emitting element and a second light-emitting element which emits light having a wavelength longer than that of light emitted from the first light-emitting element and starts to emit light at a lower voltage than the first light-emitting element, is provided. The first light-emitting element and the second light-emitting element are connected in parallel, whereby a mixed color of emission colors of the first light-emitting element and the second light-emitting element is controlled by a voltage applied to the first light-emitting element and the second light-emitting element. | 04-03-2014 |
| 20140117339 | Light-Emitting Panel, Display Device, and Method for Manufacturing Light-Emitting Panel - A light-emitting panel in which a decrease in aperture ratio accompanied by fabrication of a high-definition panel is suppressed is provided. A light-emitting panel which can be produced easily is provided. The light-emitting panel includes a first light-emitting element and a second light-emitting element which include a selectively formed layer containing a light-emitting organic compound, optical elements which are formed before forming the layer or formed so as not to cause damage to the layer and which light emitted from the first light-emitting element or the second light-emitting element enters, and a third light-emitting element which does not include the selectively formed layer containing the light-emitting organic compound. Lights of different colors are emitted from the optical elements and the third light-emitting element. | 05-01-2014 |
| 20140124764 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - To provide a novel heterocyclic compound capable of being used as a host material in which a light-emitting substance is dispersed. To provide a light-emitting element having a long lifetime. A heterocyclic compound in which a dibenzo[f,h]quinoxalinyl group and a benzo[b]naphtho[1,2-d]furanyl group are bonded through an arylene group having 6 to 13 carbon atoms. The dibenzo[f,h]quinoxalinyl group, the benzo[b]naphtho[1,2-d]furanyl group, and the arylene group separately are unsubstituted or have, as a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 13 carbon atoms. | 05-08-2014 |
| 20140126188 | Light-Emitting Device, Electronic Device, and Lighting Device - A light energy reuse type light-emitting device with low power consumption is provided by converting light from a light-emitting device into electric power efficiently for reuse. Also, a light energy reuse type light-emitting device with high yield is provided. A light-blocking film of the light-emitting device is replaced to a photoelectric conversion element, so that light is converted into electric power. That is, conventionally, light is not emitted in a portion of a light-blocking film. In the disclosed invention, light which is not emitted can be converted into electric power by a photoelectric conversion element, and can be reused. Therefore, a light-emitting device with low power consumption is realized. | 05-08-2014 |
| 20140131686 | Light-Emitting Element, Light-Emitting Device, Lighting Device, and Electronic Device - To provide a light-emitting element including a novel compound, which is capable of being used for a transport layer, a host material, or a light-emitting material in a light-emitting element. A light-emitting element which includes an EL layer between a pair of electrodes. In an analysis of the EL layer by liquid chromatography mass spectrometry, an ion having a mass/charge ratio (m/z) of 772 is detected, and by collision of an argon gas with the ion at an energy greater than or equal to 30 eV and less than or equal to 100 eV, one or more of an ion having a mass/charge ratio (m/z) of 349 and an ion having a mass/charge ratio (m/z) of 425 is or are detected. | 05-15-2014 |
| 20140145175 | Carbazole Derivative, Light-Emitting Element Material and Organic Semiconductor Material - An object is to provide a novel carbazole derivative that has an excellent carrier-transport property and can be suitably used for a transport layer or as a host material of a light-emitting element. Another object is to provide an organic semiconductor material and a light-emitting element material each using the carbazole derivative. As the carbazole derivative that can achieve the above objects, a carbazole derivative in which a carbazolyl group whose either 2- or 3-position of carbazole is substituted by the 4-position of a dibenzothiophene skeleton or a dibenzofuran skeleton is bonded to aromatic hydrocarbon that has 14 to 70 carbon atoms and includes a condensed tricyclic ring, a condensed tetracyclic ring, a condensed pentacyclic ring, a condensed hexacyclic ring, or a condensed heptacyclic ring has been able to be synthesized. | 05-29-2014 |
| 20140151662 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element in which a light-emitting layer contains an organic compound capable of emitting phosphorescence is provided. A light-emitting element which can have low driving voltage, high current efficiency, or a long lifetime is provided. In a light-emitting element in which a light-emitting layer is interposed between a pair of electrodes, the light-emitting layer contains an organic compound. The organic compound has a 1,2,4-triazole skeleton, a phenyl skeleton, an arylene skeleton, and a Group 9 metal or a Group 10 metal. The nitrogen atom at the 4-position of the 1,2,4-triazole skeleton coordinates to the Group 9 metal or the Group 10 metal. The nitrogen atom at the 1-position of the 1,2,4-triazole skeleton is bonded to a phenyl skeleton. The arylene skeleton is bonded to the 3-position of the 1,2,4-triazole skeleton and the Group 9 metal or the Group 10 metal. | 06-05-2014 |
| 20140159011 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a light-emitting element which has high emission efficiency and a long lifetime and is driven at low voltage. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes a compound which gives a first peak at a m/z of around 266.10 in a mass spectrum. | 06-12-2014 |
| 20140159097 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - An object is to provide a light-emitting element which uses a plurality of kinds of light-emitting dopants and has high emission efficiency. In one embodiment of the present invention, a light-emitting device, a light-emitting module, a light-emitting display device, an electronic device, and a lighting device each having reduced power consumption by using the above light-emitting element are provided. Attention is paid to Förster mechanism, which is one of mechanisms of intermolecular energy transfer. Efficient energy transfer by Förster mechanism is achieved by making an emission wavelength of a molecule which donates energy overlap with a local maximum peak on the longest wavelength side of a graph obtained by multiplying an absorption spectrum of a molecule which receives energy by a wavelength raised to the fourth power. | 06-12-2014 |
| 20140175413 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An organometallic complex which can be provided at low cost and which emits blue phosphorescence is provided. An organometallic complex in which nitrogen at the 1-position of a 5-aryl-4H-1,2,4-triazole derivative is coordinated to a Group 9 metal or a Group 10 metal, the aryl group is bonded to the Group 9 metal or the Group 10 metal, and the 5-aryl-4H-1,2,4-triazole derivative is a 3-aryl-5,6,7,8-tetrahydro-4H-[1,2,4]triazolo[4,3-a]pyridine derivative is provided. The organometallic complex emits green to blue phosphorescence and is also advantageous in terms of cost. | 06-26-2014 |
| 20140179920 | Organometallic Complex, and Light-Emitting Element and Display Device Using the Organometallic Complex - An object is to provide an organometallic complex whose phosphorescence characteristics can be adjusted by varying the structure of a ligand. Alternatively, an object is to provide an organometallic complex capable of emitting yellow phosphorescence with high luminance. Alternatively, an object is to provide a light-emitting device with high added value. An organometallic complex which has a structure represented by a general formula (G1) below and at least one substituent group represented by a general formula (G2) below as a phenyl group and is formed in such a way that a phenylpyrazine derivative represented by a general formula (G0) below is ortho-metalated by an ion of a Group 9 metal or of a Group 10 metal is provided. Alternatively, a light-emitting element and a light-emitting device formed including the organometallic complex are provided. | 06-26-2014 |
| 20140183503 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - Disclosed is a light-emitting element having high emission efficiency, capable of driving at low voltage, and showing a long lifetime. The light-emitting element contains a compound between a pair of electrodes, and the compound is configured to give a first peak of m/z around 202 and a second peak of m/z around 227 in a mass spectrum. The first and second peaks are product ions of the compound and possess compositions of C | 07-03-2014 |
| 20140191220 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element of the present invention can have sufficiently high emission efficiency with a structure including a host material being able to remain chemically stable even if a phosphorescent compound having higher emission energy is used as a guest material. The relation between the relative emission intensity and the emission time of light emission obtained from the host material and the guest material contained in a light-emitting layer is represented by a multicomponent decay curve. The relative emission intensity of the slowest component of the multicomponent decay curve becomes 1/100 for a short time within a range where the slowest component is not interfered with by quenching of the host material (the emission time of the slowest component is preferably less than or equal to 15 μsec); thus, sufficiently high emission efficiency can be obtained. | 07-10-2014 |
| 20140206887 | Light-Emitting Element and Electronic Device - An object is to provide a light-emitting element with high emission efficiency which includes a novel carbazole derivative that has a wide energy gap and can be used for a transport layer or a host material in a light-emitting element. A carbazole derivative in which the 4-position of dibenzothiophene or dibenzofuran is bonded to the 2- or 3-position of carbazole has been able to be provided by use of the carbazole derivative. Further, a light-emitting element having high emission efficiency has been able to be provided by use of the carbazole derivative. | 07-24-2014 |
| 20140231770 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel substance capable of emitting phosphorescence is provided. An organometallic complex represented by General Fomulae (G3) or (G5). In the formulae, M represents iridium, platinum, palladium, or rhodium, R | 08-21-2014 |
| 20140234700 | ELECTRODE FOR STORAGE BATTERY - With a small amount of a conductive additive, an electrode for a storage battery including an active material layer which is highly filled with an active material is provided. The use of the electrode enables fabrication of a storage battery having high capacity per unit volume of the electrode. By using graphene as a conductive additive in an electrode for a storage battery including a positive electrode active material, a network for electron conduction through graphene is formed. Consequently, the electrode can include an active material layer in which particles of an active material are electrically connected to each other by graphene. Therefore, graphene is used as a conductive additive in an electrode for a sodium-ion secondary battery including an active material with low electric conductivity, for example, an active material with a band gap of 3.0 eV or more. | 08-21-2014 |
| 20140246656 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, an organometallic complex having high emission efficiency and improved color purity is provided. The color purity is improved by reducing the half width of an emission spectrum. The organometallic complex is represented by General Formula (G1). In General Formula (G1), at least one of R | 09-04-2014 |
| 20140252338 | LIGHT-EMITTING ELEMENT - To provide a light-emitting element with high emission efficiency or long lifetime, in which the use amount of a phosphorescent compound is small. To provide a light-emitting element including a light-emitting layer between a pair of electrodes, wherein the light-emitting layer includes a phosphorescent compound, a first organic compound, and a second organic compound, and the combination of the first organic compound and the second organic compound forms an exciplex. The light-emitting element transfers energy by utilizing the overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency, even when the concentration of the phosphorescent compound is low. | 09-11-2014 |
| 20140256934 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, and Electronic Device Including the Organometallic Complex - Provided is a novel organometallic complex which can be synthesized easily and emits phosphorescence, or a compound which emits red phosphorescence. The inventors focused on easy synthesis of an m-aminophenyl pyrazine derivative represented by the following general formula (G0), synthesized an organometallic complex having a structure in which the derivative is coordinated to a Group 9 or Group 10 metal ion, and further synthesized a useful substance which emits red phosphorescence. | 09-11-2014 |
| 20140264398 | Light Emitting Unit, Light Emitting Device, and Lighting Device - The light-emitting unit has at least a first light-emitting element, a second light-emitting element, and a separation layer. The separation layer has a leg portion and a stage portion which protrudes outside of a bottom surface of the leg portion over the leg portion. An upper electrode of the first light-emitting element is electrically connected to a lower electrode of the second light-emitting element in a region where the upper electrode and the lower electrode overlap with the stage portion of the separation layer. By providing the separation layer, the light-emitting unit can be formed without using a metal mask. The upper electrode can be a composite material including an organic compound and a metal oxide or a stacked layer of the composite material and a metal material or a light-transmitting conductive material. | 09-18-2014 |
| 20140284578 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An organic compound having a low HOMO level and a high hole-transport property is provided. The organic compound is represented by Formula (G1), where Ar | 09-25-2014 |
| 20140284587 | Light-Emitting Device, Lighting Device, and Manufacturing Method of Light-Emitting Device - The manufacturing method of the light-emitting device is provided in which an auxiliary electrode in contact with an electrode formed using a transparent conductive film of a light-emitting element is formed using a mask, and direct contact between the auxiliary electrode and an EL layer is prevented by oxidizing the auxiliary electrode. Further, the light-emitting device manufactured according to the method and the lighting device including the light-emitting device are provided. | 09-25-2014 |
| 20140291642 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - Provided is a light-emitting element having a light-emitting layer which contains at least a host material and a plurality of guest materials, where the host material has a lower T1 level than that of at least one of the plurality of guest materials. The emission of the one of the plurality of guest materials exhibits a multicomponent decay curve, and the lifetime thereof is less than or equal to 15 μsec, preferably less than or equal to 10 μsec, more preferably less than or equal to 5 μsec, where the lifetime is defined as a time for the emission to decrease in intensity to 1/100 of its initial intensity. | 10-02-2014 |
| 20140291643 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - A novel organic compound that forms an exciplex emitting light with high efficiency is provided. An organic compound with a triarylamine skeleton in which the three aryl groups of the triarylamine skeleton are a p-biphenyl group, a fluoren-2-yl group, and a phenyl group to which a dibenzofuranyl group or a dibenzothiophenyl group is bonded. By the use of the organic compound and an organic compound with an electron-transport property, an exciplex that emits light with extremely high efficiency can be formed. | 10-02-2014 |
| 20140291645 | Light-Emitting Element, Compound, Organic Compound, Display Module, Lighting Module, Light-Emitting Device, Display Device, Lighting Device, and Electronic Device - A light-emitting element having high emission efficiency is provided. A light-emitting element having a low driving voltage is provided. A novel compound which can be used for a transport layer or as a host material or a light-emitting material of a light-emitting element is provided. A novel compound with a benzofuropyrimidine skeleton is provided. Also provided is a light-emitting element which includes the compound with the benzofuropyrimidine skeleton between a pair of electrodes. | 10-02-2014 |
| 20140291647 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element which includes a plurality of light-emitting layers between a pair of electrodes and has low driving voltage and high emission efficiency is provided. A light-emitting element including first to third light-emitting layers between a cathode and an anode is provided. The first light-emitting layer includes a first phosphorescent material and a first electron-transport material; the second light-emitting layer includes a second phosphorescent material and a second electron-transport material; the third light-emitting layer includes a fluorescent material and a third electron-transport material; the first to third light-emitting elements are provided in contact with an electron-transport layer positioned on a cathode side; and a triplet excitation energy level of a material included in the electron-transport layer is lower than triplet excitation energy levels of the first electron-transport material and the second electron-transport material. | 10-02-2014 |
| 20140299861 | Heterocyclic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A substance having a hole-transport property and a wide band gap is provided. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, α | 10-09-2014 |
| 20140319492 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - Provided is a light-emitting element with high emission efficiency. The light-emitting element including a first electrode, a second electrode, and a layer containing an organic compound between the first electrode and the second electrode. The layer containing the organic compound includes a light-emitting layer at least containing a first organic compound, a second organic compound, and a fluorescent substance. The first organic compound has an electron-transport property. The second organic compound has a hole-transport property. The second organic compound has a triarylamine skeleton. At least one of three aryl groups in the triarylamine skeleton is a group including a p-biphenyl skeleton. | 10-30-2014 |
| 20140330017 | Heterocyclic Compound, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Lighting Device, and Electronic Device - Provided is a heterocyclic compound that can be used for a carrier-transport material, a host material, or a light-emitting material in a light-emitting element. The heterocyclic compound has an indolo[3,2,1-jk]carbazole skeleton and a dibenzo[f,h]quinoxaline skeleton which are linked to each other through an arylene group. The wide band gap of the heterocyclic compound allows excitation of a green-emissive phosphorescent material, which contributes to the formation of a highly efficient light-emitting element. | 11-06-2014 |
| 20140332715 | LITHIUM MANGANESE OXIDE COMPOSITE, SECONDARY BATTERY, AND MANUFACTURING METHOD THEREOF - To increase the amount of lithium ions that can be received and released in and from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A composite material of crystallites of LiMn | 11-13-2014 |
| 20140332831 | Light-Emitting Panel, Light-Emitting Device, and Method for Manufacturing the Light-Emitting Panel - A light-emitting panel can be manufactured in which a first light-emitting element emits light having high brightness and a pale color and causing less eyestrain even in the case of long time, a second light-emitting element emits light of a bright red color, a third light-emitting element emits green light, and a fourth light-emitting element emits blue light. Further, a layer transmitting light of a specific color (e.g., a color filter) is not provided in all the light-emitting elements except the second light-emitting element; thus, light emitted from the layer containing a light-emitting organic compound can be efficiently used. As a result, a light-emitting panel which is capable of bright, full-color light emission and whose power consumption is reduced can be provided. | 11-13-2014 |
| 20140339522 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - To increase emission efficiency of a fluorescent light-emitting element by efficiently utilizing a triplet exciton generated in a light-emitting layer. The light-emitting layer of the light-emitting element includes at least a host material and a guest material. The triplet exciton generated from the host material in the light-emitting layer is changed to a singlet exciton by triplet-triplet annihilation (TTA). The guest material (fluorescent dopant) is made to emit light by energy transfer from the singlet exciton. Thus, the emission efficiency of the light-emitting element is improved. | 11-20-2014 |
| 20140339524 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, LIGHTING DEVICE, AND ELECTRONIC DEVICE - Provided is a light-emitting element which has an anode, a light-emitting layer over the anode, an electron-transport layer over and in contact with the light-emitting layer, an electron-injection layer over and in contact with the electron-transport layer, and a cathode over and in contact with the electron-injection layer. The light-emitting layer has an electron-transport property, and the electron-transport layer includes an anthracene derivative. The light-emitting layer further includes a phosphorescent substance. This device structure allows the formation of a highly efficient blue-emissive light-emitting element even though the phosphorescent substance has higher triplet energy than the anthracene derivative which directly contacts with the light-emitting layer. | 11-20-2014 |
| 20140339526 | ORGANOMETALLIC COMPLEX, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE - A light-emitting element including a phosphorescent organometallic complex is provided. The organometallic complex emits phosphorescence in the yellow green to orange wavelength range and has high emission efficiency and high reliability. Thus, the organometallic complex that exhibits phosphorescence is provided. The organometallic complex, in which nitrogen at the 3-position of a pyrimidine ring is coordinated to a metal, a carbazole skeleton is bonded to the 4-position of the pyrimidine ring, and the carbazole skeleton is bonded to the metal, is used as an emission center. The metal is preferably a Group 9 element or a Group 10 element, more preferably iridium. | 11-20-2014 |
| 20140339533 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An object is to provide a novel organometallic complex that has a broader emission spectrum in the wavelength range of green to blue. Other objects are to provide a light-emitting element using the organometallic complex, and a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. Provided is an organometallic complex represented by a general formula (G1). Represented by the general formula (G1) is a novel organometallic complex that exhibits a broad emission spectrum in the wavelength range of green to blue. Further provided are a light-emitting element using the organometallic complex, and a light-emitting device, an electronic device, and a lighting device each using the light-emitting element. | 11-20-2014 |
| 20140340888 | LIGHT-EMITTING ELEMENT, LIGHTING DEVICE, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE - A light-emitting element includes a first electrode; a first light-emitting layer over the first electrode, containing a first phosphorescent compound and a first host material; a second light-emitting layer over the first light-emitting layer, containing a second phosphorescent compound and a second host material; a third light-emitting layer over the second light-emitting layer, containing a third phosphorescent compound and a third host material; and a second electrode over the third light-emitting layer. Between peaks of emission spectra of the first, second, and third phosphorescent compounds, the peak of the emission spectrum of the second phosphorescent compound is on the longest wavelength side and that of the emission spectrum of the third phosphorescent compound is on the shortest wavelength side. The third host material has higher triplet excitation energy than the first host material and the second host material. | 11-20-2014 |
| 20140346491 | Light-Emitting Module, Light-Emitting Device, Method of Manufacturing the Light-Emitting Module, and Method of Manufacturing the Light-Emitting Device - A highly reliable light-emitting module including an organic EL element or a light-emitting device using a highly reliable light-emitting module including an organic EL element is provided. Alternatively, a method of manufacturing a highly reliable light-emitting module including an organic EL element, or a method of manufacturing a light-emitting device using a highly reliable light-emitting module including an organic EL element is provided. The light-emitting module has a structure in which a light-emitting element formed over a first substrate and a viscous material layer are sealed in a space between the first substrate and a second substrate which face each other, with a sealing material surrounding the light-emitting element. The viscous material layer is provided between the light-emitting element and the second substrate and includes a non-solid material and a drying agent which reacts with or adsorbs an impurity. | 11-27-2014 |
| 20140367662 | Organometallic Iridium Complex, Light-Emitting Element, Light-Emitting Device, and Lighting Device - An organometallic iridium complex that has high emission efficiency and a long lifetime and emits deep red light (emission wavelength: around 700 nm) is provided. The organometallic iridium complex has a ligand that is represented by General Formula (G0) and has at least a dimethyl phenyl group and a quinoxaline skeleton. | 12-18-2014 |
| 20140377644 | NONAQUEOUS SOLVENT, NONAQUEOUS ELECTROLYTE, AND POWER STORAGE DEVICE - A nonaqueous solvent that includes an ionic liquid and has at least one of the following characteristics: high lithium ion conductivity, high lithium ion conductivity in a low temperature environment, high heat resistance, a wide available temperature range, a low freezing point (melting point), low viscosity, and the like. The nonaqueous solvent includes an ionic liquid and a fluorinated solvent. The ionic liquid contains an alicyclic quaternary ammonium cation which has a substituent and a counter anion to the alicyclic quaternary ammonium cation which has the substituent. | 12-25-2014 |
| 20150014581 | POSITIVE ELECTRODE ACTIVE MATERIAL AND SECONDARY BATTERY - A positive electrode active material that achieves high capacity and high energy density of a secondary battery is provided. The positive electrode active material is represented by Li | 01-15-2015 |
| 20150014605 | LITHIUM-MANGANESE COMPOSITE OXIDE, SECONDARY BATTERY, AND ELECTRIC DEVICE - The amount of lithium ions that can be received and released in and from a positive electrode active material is increased, and high capacity and high energy density of a secondary battery are achieved. Provided is a lithium-manganese composite oxide represented by Li | 01-15-2015 |
| 20150021577 | Organic Compound, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Lighting Device, and Electronic Device - A novel organic compound that can be used as a carrier-transport material, a host material, or a light-emitting material in a light-emitting element is provided. Specifically, an organic compound that can give a light-emitting element having favorable characteristics even when the organic compound is used in a light-emitting element emitting phosphorescence is provided. The organic compound has a bipyridine skeleton formed by two pyridine skeletons to each of which a dibenzothiophenyl group or a dibenzofuranyl group is bonded via an arylene group. | 01-22-2015 |
| 20150021579 | LIGHT-EMITTING ELEMENT - A light-emitting element having extremely high efficiency of approximately 25% is provided. The light-emitting element includes a light-emitting layer which contains a phosphorescent guest, an n-type host, and a p-type host, where the light-emitting layer is interposed between an n-type layer including the n-type host and a p-type layer including the p-type host, and where the n-type host and the p-type host are able to form an exciplex in the light-emitting layer. The light-emitting element exhibits an extremely high emission efficiency (power efficiency of 74.3 lm/W, external quantum efficiency of 24.5%, energy efficiency of 19.3%) at a low driving voltage (2.6 V) at which luminance of 1200 cd/m | 01-22-2015 |
| 20150031900 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - An organic compound that emits blue light with high color purity and has a long lifetime is provided as a novel substance. The organic compound is a fluorescent organic compound having a structure in which benzonaphthofuranylamine is bonded to the 1-position and the 6-position of a pyrene skeleton. | 01-29-2015 |
| 20150041792 | Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen). | 02-12-2015 |
| 20150041795 | Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - A light-emitting element with improved heat resistance is provided without losing its advantages such as thinness, lightness, and low power consumption. A light-emitting element is provided which includes a first electrode, a second electrode, and an EL layer between the first electrode and the second electrode, in which the EL layer includes a layer containing a condensed aromatic compound or a condensed heteroaromatic compound, and a layer containing 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen) in contact with the layer containing the condensed aromatic compound or the condensed heteroaromatic compound. | 02-12-2015 |
| 20150053958 | LIGHT-EMITTING ELEMENT, DISPLAY MODULE, LIGHTING MODULE, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE - A multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application is provided. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance and a second light-emitting layer containing two kinds of organic compounds and a substance that can convert triplet excitation energy into luminescence. Note that light emitted from the first light-emitting layer has an emission peak on the shorter wavelength side than light emitted from the second light-emitting layer. | 02-26-2015 |
| 20150060813 | Heterocyclic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel heterocyclic compound that can be used as a host material in which a light-emitting substance is dispersed. A light-emitting element having a long lifetime. A heterocyclic compound in which a substituted or unsubstituted dibenzo[f,h]quinoxalinyl group is bonded to a substituted or unsubstituted arylene group having 6 to 25 carbon atoms which is bonded to any one of the 8-11 positions of a substituted or unsubstituted benzo[b]naphtho[1,2-d]furan skeleton. | 03-05-2015 |
| 20150060818 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a novel organic compound that can be used as a host material of a light-emitting layer in which a light-emitting substance is dispersed. The organic compound is represented by General Formula (G1-1). In the formula, A represents a substituted or unsubstituted dibenzo[f,h]quinoxalin-yl group, Ar | 03-05-2015 |
| 20150060824 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a novel organic compound that is used as a host material in which a light-emitting substance is dispersed. The organic compound is represented by General Formula (G1). In the formula, A represents a substituted or unsubstituted dibenzofuran-diyl group, a substituted or unsubstituted dibenzothiophene-diyl group, a substituted or unsubstituted N-aryl-9H-carbazole-diyl group, or a substituted or unsubstituted N-alkyl-9H-carbazole-diyl group; Ar | 03-05-2015 |
| 20150073142 | Organometallic Iridium Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - An organometallic iridium complex has high emission efficiency and a long lifetime. The iridium complex includes the structure represented by Formula (G1). In the formula, Ar represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms. R | 03-12-2015 |
| 20150073144 | Phosphorescent Organometallic Iridium Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - As a novel substance having a novel skeleton, provided is a novel phosphorescent organometallic iridium complex that can emit phosphorescence in a blue green to red wavelength region and has high emission efficiency. The phosphorescent organometallic iridium complex has a ligand having a pyridyl pyrimidine skeleton, i.e., the phosphorescent organometallic iridium complex has a ligand having a structure represented by the following general formula (G0). | 03-12-2015 |
| 20150073147 | Organic Compound, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - A novel organic compound is provided. In addition, a novel organic compound with high heat resistance is provided. In the organic compound, a dibenzoquinoxaline skeleton and a 4,4-bidibenzofuran skeleton or a 4,4′-bidibezothiophene skeleton are connected to each other through an arylene group. | 03-12-2015 |
| 20150075720 | MANUFACTURING APPARATUS OF STACK - The stack manufacturing apparatus includes a first supporting body supply unit which is configured to intermittently unroll a roll sheet-shaped first supporting body and includes one of a pair of tension applying devices capable of applying tension to the unrolled first supporting body; a first adhesive layer formation unit configured to form a first adhesive layer over the first supporting body while the first supporting body supply unit suspends unrolling of the first supporting body; a first bonding unit configured to bond the first supporting body and a sheet-shaped member using the first adhesive layer; and a control unit which is configured to hold an end portion of the first supporting body and includes the other of the pair of tension applying devices. | 03-19-2015 |
| 20150080574 | Dibenzo[f,h]Quinoxaline Derivative, Method of Synthesizing the Same, Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A dibenzo[f,h]quinoxaline derivative in which impurities are reduced and a novel method of synthesizing the dibenzo[f,h]quinoxaline derivative in which impurities are reduced are provided. In addition, a light-emitting element, a light-emitting device, an electronic appliance, or a lighting device with high emission efficiency and high reliability in which the dibenzo[f,h]quinoxaline derivative is used as an EL material is provided. In the synthesis method, a 2-(chloroaryl)dibenzo[f,h]quinoxaline derivative is used as a synthetic intermediate in a synthetic pathway so that an impurity contained in a final product can be removed easily by purification by sublimation. | 03-19-2015 |
| 20150086860 | POWER STORAGE DEVICE - A power storage device with reduced initial irreversible capacity is provided. The power storage device includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode active material and a water-soluble polymer. The electrolyte solution includes an ionic liquid. The ionic liquid includes a cation and a monovalent amide anion. | 03-26-2015 |
| 20150099178 | LITHIUM MANGANESE COMPOSITE OXIDE, SECONDARY BATTERY, AND ELECTRICAL DEVICE - The volume density or weight density of lithium ions that can be received and released in and from a positive electrode active material is increased to achieve high capacity and high energy density of a secondary battery. In a lithium manganese composite oxide, each particle includes a first region including a crystal with a layered rock-salt crystal structure and a second region including a crystal with a spinel crystal structure. The second region is in contact with the outside of the first region. The lithium manganese composite oxide has high structural stability and high capacity. | 04-09-2015 |
| 20150102331 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element with high reliability that can keep favorable characteristics after long-time driving is provided. In addition, a light-emitting device having a long lifetime including the light-emitting element is provided. Moreover, an electronic device and a lighting device having a long lifetime are provided. In a light-emitting element including an EL layer between a pair of electrodes, a light-emitting layer included in the EL layer has a stacked-layer structure which is different from the conventional structure, whereby the light-emitting element can keep favorable characteristics after long-time driving even in the case where carrier balance is changed over time due to driving of the light-emitting element or a light-emitting region is shifted due to the change. | 04-16-2015 |
| 20150108462 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device and Lighting Device - Provided is a novel substance that can emit phosphorescence. Alternatively, provided is a novel substance with high emission efficiency. An organometallic complex in which a 4-arylpyrimidine derivative is a ligand and iridium is a central metal is provided. Specifically, an organometallic complex having a structure represented by a general formula (G1) is provided. In the general formula (G1), R | 04-23-2015 |
| 20150131302 | Organic Compound, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - A novel organic compound is provided. Alternatively, an organic compound that can be used as an electron-transport material of a light-emitting element is provided. An organic compound in which heteroaromatic groups each including two pyridine rings are bonded to the 2- and 8-positions of dibenzofuran is provided. The organic compound is an organic compound that can be used as an electron-transport material of a light-emitting element. | 05-14-2015 |
| 20150137711 | Lighting Device - A lighting device using an electroluminescent material, in which color mixing and dimming can be performed by a simple method, is provided. A lighting device including a first light-emitting element and a second light-emitting element which emits light having a wavelength longer than that of light emitted from the first light-emitting element and starts to emit light at a lower voltage than the first light-emitting element, is provided. The first light-emitting element and the second light-emitting element are connected in parallel, whereby a mixed color of emission colors of the first light-emitting element and the second light-emitting element is controlled by a voltage applied to the first light-emitting element and the second light-emitting element. | 05-21-2015 |
| 20150140449 | COMPOUND, NONAQUEOUS ELECTROLYTE, AND POWER STORAGE DEVICE - Provided are a nonaqueous solvent containing a compound with high conductivity and low viscosity and a high-performance power storage device using the nonaqueous solvent. The power storage device includes an ionic liquid. The ionic liquid contains an anion and a cation having a five-membered heteroaromatic ring having one or more substituents. At least one of the substituents is a straight chain formed of four or more atoms and includes one or more of C, O, Si, N, S, and P. | 05-21-2015 |
| 20150155510 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE - A light-emitting element includes a stack of a first light-emitting layer emitting fluorescent light and a second light-emitting layer emitting phosphorescent light between a pair of electrodes. The second light-emitting layer includes a first layer in which an exciplex is formed, a second layer in which an exciplex is formed, and a third layer in which an exciplex is formed. The second layer is located over the first layer, and the third layer is located over the second layer. An emission peak wavelength of the second layer is longer than an emission peak wavelength of the first layer and an emission peak wavelength of the third layer. | 06-04-2015 |
| 20150155511 | LIGHT-EMITTING ELEMENT, DISPLAY MODULE, LIGHTING MODULE, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE - An object of one embodiment of the present invention is to provide a multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance, a separation layer containing a substance having a hole-transport property and a substance having an electron-transport property, and a second light-emitting layer containing two kinds of organic compounds that form an exciplex and a substance that can convert triplet excitation energy into luminescence. Note that a light-emitting element in which light emitted from the first light-emitting layer has an emission spectrum peak on the shorter wavelength side than an emission spectrum peak of the second light-emitting layer is more effective. | 06-04-2015 |
| 20150155556 | LITHIUM-MANGANESE COMPOSITE OXIDE AND SECONDARY BATTERY - To increase the amount of lithium ions that can be received in and released from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese oxide particle includes a first region and a second region. The valence number of manganese in the first region is lower than the valence number of manganese in the second region. The lithium manganese oxide has high structural stability and high capacity characteristics. | 06-04-2015 |
| 20150188068 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - An object is to provide a light-emitting element which uses a plurality of kinds of light-emitting dopants and has high emission efficiency. In one embodiment of the present invention, a light-emitting device, a light-emitting module, a light-emitting display device, an electronic device, and a lighting device each having reduced power consumption by using the above light-emitting element are provided. Attention is paid to Förster mechanism, which is one of mechanisms of intermolecular energy transfer. Efficient energy transfer by Förster mechanism is achieved by making an emission wavelength of a molecule which donates energy overlap with the longest-wavelength-side local maximum peak of a graph obtained by multiplying an absorption spectrum of a molecule which receives energy by a wavelength raised to the fourth power. | 07-02-2015 |
| 20150188072 | Light-Emitting Element - Provided is a light-emitting element with high external quantum efficiency and a low drive voltage. The light-emitting element includes a light-emitting layer which contains a phosphorescent compound and a material exhibiting thermally activated delayed fluorescence between a pair of electrodes, wherein a peak of a fluorescence spectrum and/or a peak of a phosphorescence spectrum of the material exhibiting thermally activated delayed fluorescence overlap(s) with a lowest-energy-side absorption band in an absorption spectrum of the phosphorescent compound, and wherein the phosphorescent compound exhibits phosphorescence in the light-emitting layer by voltage application between the pair of electrodes. | 07-02-2015 |
| 20150197508 | Triazole Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device and Lighting Device Using the Triazole Derivative - Objects are to provide the following: a substance that facilitates hole injection and has high triplet excitation energy; a light-emitting element having high emission efficiency using the substance that facilitates hole injection and has high triplet excitation energy; a light-emitting element having low driving voltage; and a light-emitting device, an electronic device, and a lighting device having low power consumption. Provided is a triazole derivative in which a dibenzothiophen-4-yl or dibenzofuran-4-yl group represented by General Formula (G2) is bonded to any one of Ar | 07-16-2015 |
| 20150214273 | Light-Emitting Device and Display Device - A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is. | 07-30-2015 |
| 20150214506 | Light-Emitting Element, Light-Emitting Device, and Display Device - A light-emitting element with which a reduction in power consumption and an improvement in productivity of a display device can be achieved is provided. A technique of manufacturing a display device with high productivity is provided. The light-emitting element includes an electrode having a reflective property, and a first light-emitting layer, a charge generation layer, a second light-emitting layer, and an electrode having a light-transmitting property stacked in this order over the electrode having a reflective property. The optical path length between the electrode having a reflective property and the first light-emitting layer is one-quarter of the peak wavelength of the emission spectrum of the first light-emitting layer. The optical path length between the electrode having a reflective property and the second light-emitting layer is three-quarters of the peak wavelength of the emission spectrum of the second light-emitting layer. | 07-30-2015 |
| 20150221703 | Light-Emitting Device and Display Device - A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is to the electrode having a reflective property, the longer the wavelength of light emitted from the light-emitting layer is. | 08-06-2015 |
| 20150221875 | ORGANIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R | 08-06-2015 |
| 20150236301 | Light-Emitting Element, Light-Emitting Device, and Lighting Device - Described is a solid-state light-emitting element, a light-emitting device using the solid-state light-emitting element, and a lighting device using the light-emitting device. The solid-state light-emitting element comprises a member with a low refractive index which has a hemispherical structure on a first surface and an uneven structure on a second surface, a bonding layer with a high refractive index which planarizes the uneven structure, and a light-emitting body whose light-emitting surface is in contact with a flat surface of the bonding layer. The uneven structure of the member with a low refractive index is provided inside at least an outside shape of the hemispherical structure formed on the first surface; and the light-emitting body is provided such that an outside shape of the light-emitting region of the light-emitting body is smaller than the outside shape of the hemispherical structure and overlaps with the hemispherical structure. | 08-20-2015 |
| 20150243892 | Organic Compound, Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device - A light-emitting element with high emission efficiency. The light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. In the light-emitting element, the EL layer contains at least a light-emitting material, the light-emitting material is a 1,6-bis(diphenylamino)pyrene derivative, and a structural change between an excited state and a ground state in the 1,6-bis(diphenylamino)pyrene derivative is smaller than that in a 1,6-bis(diphenylamino)pyrene derivative in which hydrogen is bonded to ortho positions of two phenyl groups of each of two diphenylamino groups. | 08-27-2015 |
| 20150243899 | Fluorene Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Organic Compound - A substance having a hole-transport property and a wide band gap is provided. A fluorene compound represented by a general formula (G1) is provided. In the general formula (G1), α | 08-27-2015 |
| 20150243918 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element with a high current efficiency is provided. A low-power consumption light-emitting device is also provided. In addition, low-power consumption electronic device and lighting device are provided. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes a light-emitting layer. The light-emitting layer includes a first light-emitting layer and a second light-emitting layer. The emission peak of the second light-emitting layer is at a shorter wavelength than that of the first light-emitting layer. The first light-emitting layer includes a host material and a guest material. The LUMO level of the guest material is in the range of ±0.1 eV of the LUMO level of the host material. | 08-27-2015 |
| 20150249116 | Light-Emitting Module, Light-Emitting Panel, and Lighting Device - An object is to provide a light-emitting module in which a light-emitting element suffering a short-circuit failure does not cause wasteful electric power consumption. Another object is to provide a light-emitting panel in which a light-emitting element suffering a short-circuit failure does not allow the reliability of an adjacent light-emitting element to lower. Focusing on heat generated by a light-emitting element suffering a short-circuit failure, provided is a structure in which electric power is supplied to a light-emitting element through a positive temperature coefficient thermistor (PTC thermistor) thermally coupled with the light-emitting element. | 09-03-2015 |
| 20150255520 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a light-emitting device which can emit monochromatic light with high purity due to a microcavity effect and which can emit white light in the case of a combination of monochromatic light. Provided is a high-definition light-emitting device. Provided is a light-emitting device with low power consumption. In a light-emitting device with a white-color filter top emission structure, one pixel is formed of four sub-pixels of RBGY, an EL layer includes a first light-emitting substance which emits blue light and a second light-emitting substance which emits light corresponding to a complementary color of blue, and a semi-transmissive and semi-reflective electrode (an upper electrode) is formed so as to cover an edge portion of the EL layer. | 09-10-2015 |
| 20150255742 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - Provided is a light-emitting element having a light-emitting layer which contains at least a host material and a plurality of guest materials, where the host material has a lower T1 level than that of at least one of the plurality of guest materials. The emission of the one of the plurality of guest materials exhibits a multicomponent decay curve, and the lifetime thereof is less than or equal to 15 pec, preferably less than or equal to 10 pec, more preferably less than or equal to 5 pec, where the lifetime is defined as a time for the emission to decrease in intensity to 1/100 of its initial intensity. | 09-10-2015 |
| 20150263076 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Provided is a light-emitting device which can emit monochromatic lights with high color purity due to a microcavity effect and which can provide a white light with a broad spectrum when the monochromatic lights are combined. The light-emitting device has a red-, green-, blue-, and yellow-emissive light-emitting elements each of which has a reflective electrode and a semi-transmissive and semi-reflective electrode. The red-, green-, blue-, and yellow-emissive light-emitting elements have the same structure other than the reflective electrode and a layer in contact with the reflective electrode to selectively emit red, green, blue, and yellow lights, respectively. Red, green, and blue color filters are also provided over the red-, green-, blue-, light-emitting elements, respectively. An EL layer is commonly shared by the red-, green-, blue-, and yellow-emissive light-emitting elements, and the semi-transmissive and semi-reflective electrode covers an edge portion of the EL layer. | 09-17-2015 |
| 20150270499 | HETEROCYCLIC COMPOUND - Provided is a novel heterocyclic compound which can be used for a light-emitting element, as a host material of a light-emitting layer in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, A represents any of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group, R | 09-24-2015 |
| 20150270504 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex. | 09-24-2015 |
| 20150270505 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting layer, which is a stack of a first light-emitting layer and a second light-emitting layer, is provided between an anode and a cathode. The first light-emitting layer is formed on the anode side and contains a first light-emitting substance converting triplet excitation energy into light emission, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property. The second light-emitting layer contains a second light-emitting substance converting triplet excitation energy into light emission, the first organic compound, and a third organic compound having a hole-transport property. The second organic compound has a lower HOMO level than the third organic compound. The first light-emitting substance emits light with a wavelength shorter than that of light emitted from the second light-emitting substance. The first and the second organic compounds form an exciplex. The first and the third organic compounds form an exciplex. | 09-24-2015 |
| 20150280163 | Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device - A multicolor light-emitting element using fluorescence and phosphorescence, which has a small number of manufacturing steps owing to a relatively small number of layers to be formed and is advantageous for practical application can be provided. In addition, a multicolor light-emitting element using fluorescence and phosphorescence, which has favorable emission efficiency is provided. A light-emitting element which includes a light-emitting layer having a stacked-layer structure of a first light-emitting layer exhibiting light emission from a first exciplex and a second light-emitting layer exhibiting phosphorescence is provided. | 10-01-2015 |
