Patent application number | Description | Published |
20090302742 | Compound for Use in Organic Electroluminescent Device and Organic Electroluminescent Device - Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula. | 12-10-2009 |
20100187977 | COMPOUND FOR USE IN ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE - Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, fully secured of driving stability, and simply constructed. The EL device has a light-emitting layer disposed between an anode and a cathode stacked one upon another on a substrate and the light-emitting layer comprises a phosphorescent dopant and an indolocarbazole derivative as a host material. Examples of the indolocarbazole compounds include a compound represented by the following formula (2) or (3), wherein X is N or CH, at least one of Xs is N, and Ar | 07-29-2010 |
20120001165 | MATERIAL FOR PHOSPHORESCENT LIGHT-EMITTING ELEMENT AND ORGANIC ELECTROLUMINESCENT ELEMENT USING SAME - Provided is an organic electroluminescent device (organic EL device), which has improved luminous efficiency, has sufficient driving stability, and has a simple construction. The organic EL device of the present invention is an organic electroluminescent device, including a light-emitting layer and a hole-transporting layer between an anode and a cathode laminated on a substrate, in which the light-emitting layer contains a phosphorescent light-emitting dopant and an indolocarbazole compound that serves as a host material, or alternatively, the hole-transporting layer contains an indolocarbazole compound. The indolocarbazole compound is represented by the following formula (1). In the formula: A | 01-05-2012 |
20120205640 | ORGANIC ELECTROLUMINESCENT DEVICE - Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secure of driving stability, and of a simple configuration. The organic EL device comprises organic layers comprising a hole-transporting layer and a light-emitting layer sandwiched between an anode and a cathode. The light-emitting layer contains a fluorescent light-emitting material and an electron- and/or exciton-blocking layer containing an indolocarbazole derivative represented by general formula (2) is disposed between the hole-transporting layer and the light-emitting layer so as to be adjacent to the light-emitting layer. In general formula (2), ring B is a heterocyclic ring fused to the adjacent rings and represented by formula (1c), Z is an n-valent aromatic hydrocarbon group or aromatic heterocyclic group, and n is 1 or 2. | 08-16-2012 |
20120235133 | ORGANIC ELECTROLUMINESCENT DEVICE - Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The organic EL device of this invention comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and an unsymmetrical indolocarbazole compound as a host material. The unsymmetrical indolocarbazole compound has a structure in which two or more groups having an indolocarbazole structure are linked together by a linking group and at least one of the groups has an isomeric indolocarbazole skeleton different from those of the other groups. Examples of the unsymmetrical indolocarbazole compound include compounds represented by the following formula (2) wherein A is a substituent, each of R | 09-20-2012 |
20120305903 | ORGANIC ELECTROLUMINESCENT DEVICE - Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device is constituted of an anode, organic layers comprising a phosphorescent light-emitting layer, and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, an electron-transporting layer, and a hole-blocking layer contains an indolocarbazole compound represented by general formula (1). In the case where the indolocarbazole compound is incorporated in the light-emitting layer containing a phosphorescent dopant and a host material, it is incorporated as the host material. Some of such indolocarbazole compounds are represented by the following formula (2): wherein each of A | 12-06-2012 |
20120305904 | Organic Electroluminescent Device - Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device has a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer contains a fused polycyclic compound in which seven or more rings are fused together as a host material. The aforementioned fused polycyclic compound has a structure formed by fusing two or more indole rings to a carbazole ring. A specific example thereof is the compound represented by the following formula. | 12-06-2012 |
20130207097 | ORGANIC ELECTROLUMINESCENT ELEMENT - Provided is an organic electroluminescent device (EL device) that uses an indolocarbazole compound. The organic EL device includes an anode, a plurality of organic layers including a phosphorescent light-emitting layer, and a cathode laminated on a substrate, in which at least one organic layer selected from the phosphorescent light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer contains an indolocarbazole compound represented by the general formula (1). In the general formula (1), a ring I and a ring II represent rings represented by the formula (1a) and the formula (1b), respectively, each of which are fused to an adjacent ring. X's each represent nitrogen or C—Y and at least one of X's represents nitrogen. Y's each represent hydrogen, an alkyl group, a cycloalkyl group, or an aromatic group. A represents an alkyl group, a cycloalkyl group, or an aromatic group. At least one of Y and A represents an alkyl group or a cycloalkyl group. R's each represent hydrogen, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group. | 08-15-2013 |
20150041785 | ORGANIC ELECTROLUMINESCENT ELEMENT - Provided is an organic electroluminescent device (EL device) using an indolocarbazole compound. The organic EL device is obtained by laminating an anode, a plurality of organic layers including a phosphorescent light-emitting layer, and a cathode on a substrate, and the phosphorescent light-emitting layer, a hole-transporting layer, an electron-transporting layer, a hole-blocking layer, or an electron-blocking layer contains an indolocarbazole compound represented by the general formula (1). In the general formula (1), a ring I and a ring II represent rings represented by the formula (1a) and the formula (1b) to be fused to adjacent rings, As each represent C—R or N and at least one of As represents N, Ls each represent a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted aromatic heterocyclic group, and at least one of Ls represents a two- to four-ring fused heterocyclic group, Rs each represent an aliphatic hydrocarbon group, an aromatic hydrocarbon group, or an aromatic heterocyclic group, ps each represent an integer of from 0 to 4, q represents an integer of from 0 to 2, r represents an integer of from 1 to 4, X | 02-12-2015 |