Patent application number | Description | Published |
20090214763 | PREPARATION OF THIN FILM FOR SOLAR CELL USING PASTE - A preparation method of a CIS-based or CIGS-based thin film for a light absorption layer of a solar cell, which uses a paste prepared by mixing precursors of Cu, In, Se, and optional Ga in a solvent, minimizes the raw material loss, does not produce a toxic gas during the process, and is suitable for producing a large scale film at a low production cost. | 08-27-2009 |
20100266846 | METHOD OF PRODUCING METAL NANOPARTICLES CONTINUOUSLY AND METAL NANOPARTICLES PRODUCED THEREBY - Disclosed are a method of producing metal nanoparticles continuously, and metal nanoparticles produced thereby. The method comprises: (a) preparing a metal precursor solution by dissolving a metal precursor in alcohol; (b) continuously putting the metal precursor solution into a reactor having supercritical conditions, thereby producing metal nanoparticles; (c) cooling the solution obtained in step (b); and (d) separating and collecting the metal nanoparticles from the solution obtained in step (c). | 10-21-2010 |
20110117456 | ZINC AIR FUEL CELL WITH ENHANCED CELL PERFORMANCE - Provided is a zinc air fuel cell with enhanced cell performance, more particularly a zinc air fuel cell which includes a separator-electrode assembly including a perforated metal plate as a cathode current collector, a catalyst-coated carbon paper, a separator, a perforated metal plate as an anode current collector, and a tilted nonconductive support. Furthermore, a metal plate may be placed on the tilted nonconductive support and connected to the anode current collector in the separator-electrode assembly to enlarge the active area of the anode current collector. For the zinc air fuel cell according to the present invention, a manufacturing cost may be reduced by using a mixture of MnO | 05-19-2011 |
20110196139 | PREPARATION METHOD FOR CELLULOSE PHOSPHITE COMPOUNDS - Provided is a method for preparing a cellulose phosphite compound, more particularly a method for preparing a cellulose phosphite compound whereby cellulose is phosphorylated using an ionic liquid comprising an amine-based cation and a phosphite-based anion. | 08-11-2011 |
20110303269 | FABRICATION METHOD FOR QUANTUM DOT SENSITIZED SOLAR CELL USING SUPERCRITICAL FLUID OR SUBCRITICAL FLUID AND QUATUM DOT SENSITIZED SOLAR CELL PREPARED THEREBY - A method of fabricating a transparent electrode for use in a quantum dot sensitized solar cell, and a quantum dot sensitized solar cell fabricated according to the method are provided. According to the fabrication method, (S1) quantum dot precursor is introduced into a high pressure storage vessel and a quantum dot precursor is dissolved using subcritical fluid or supercritical fluid; (S2) the quantum dot precursor fluid prepared at (S1) is transported to contact with a conductive thin layer substrate comprised of a metal oxide placed in a high pressure reaction vessel, thereby causing the quantum dot precursor to be adsorbed in the metal oxide thin layer; (S3) non-adsorbed quantum dot precursor fluid of (S2) is transported and thus recovered to the high pressure storage vessel together with the subcritical fluid or supercritical fluid; and (S4) the subcritical fluid or supercritical fluid is removed from the high pressure reaction vessel, and the quantum dot precursor, adsorbed at (S2), is reacted with a second element which constitutes the quantum dot or a compound comprising the second element. | 12-15-2011 |
20120080091 | FABRICATION OF CIS OR CIGS THIN FILM FOR SOLAR CELLS USING PASTE OR INK - Provided is a method for preparing a copper indium selenide (CIS) or copper indium gallium selenide (CIGS) thin film, including: (1) mixing Cu, In and Ga precursors in a solvent and adding a polymer binder to obtain a paste or ink; (2) coating the obtained CIG precursor paste or ink on a conductive substrate by printing, spin coating or spraying and heat-treating the same under air or oxygen gas atmosphere to remove remaining organic substances and obtain a CIG mixed oxide thin film; (3) heat-treating the obtained CIG mixed oxide thin film under hydrogen or sulfurizing gas atmosphere to obtain a reduced or sulfurized CIG mixed thin film; and (4) heat-treating the obtained reduced or sulfurized CIG mixed thin film under selenium-containing gas atmosphere to obtain a CIGS thin film. Since residual carbon resulting from organic additives, which is the biggest problem in the existing paste coating techniques, can be reduced remarkably, and CIGS crystal size can be improved, the disclosed method can improve efficiency of CIGS solar cells. | 04-05-2012 |
20120171108 | METHOD FOR FABRICATING GRAPHENE SHEETS OR GRAPHENE PARTICLES USING SUPERCRITICAL FLUID - A method for fabricating graphene sheets or graphene particles includes (a) dispersing graphene oxide in an alcohol solution to prepare a graphene oxide dispersion solution, (b) reducing the graphene oxide dispersion solution under a supercritical condition to prepare graphene sheets or graphene particles, each of which is as a cluster of the graphene sheets, and (c) separating the graphene sheets or graphene particles, followed by washing and drying, and a method for fabricating a graphene film is configured to fabricate a graphene film in form of a thin film using the graphene sheets or graphene particles fabricated according to the method. | 07-05-2012 |
20130048062 | SOLAR CELL COMPRISING BULK HETEROJUNCTION INORGANIC THIN FILM AND FABRICATION OF THE SOLAR CELL - Provided is a bulk heterojunction inorganic thin film solar cell and a method for fabricating the same. More particularly, the solar cell includes an inorganic thin film having a bulk heterojunction formed by using vertically grown n-type semiconductor nanostructure electrodes and filling the void spaces among the nanostructures with p-type semiconductor materials, unlike the known planar type inorganic thin film solar cells including n-type semiconductors and p-type semiconductors. | 02-28-2013 |
20140070347 | METHODS FOR PRODUCING CHALCOPYRITE COMPOUND THIN FILMS FOR SOLAR CELLS USING MULTI-STAGE PASTE COATING - Disclosed are methods for producing chalcopyrite compound (e.g., copper indium selenide (CIS), copper indium gallium selenide (CIGS), copper indium sulfide (CIS) or copper indium gallium sulfide (CIGS)) thin films. The methods are based on solution processes, such as printing, particularly, multi-stage coating of pastes or inks of precursors having different physical properties. Chalcopyrite compound thin films produced by the methods can be used as light-absorbing layers for thin-film solar cells. The use of the chalcopyrite compound thin films enables the fabrication of thin-film solar cells with improved efficiency at low costs. | 03-13-2014 |
20140109966 | BIFACIAL THIN FILM SOLAR CELL FABRICATED BY PASTE COATING METHOD - Disclosed is a bifacial thin film solar cell, particularly a bifacial CuInGaS, thin film solar cell, fabricated by a paste coating method. According to several embodiments, the bifacial thin film solar cell results in a higher conversion efficiency of bifacial illumination than the simple sum of the efficiencies of upper and lower side illumination only, unlike those previously reported. The bifacial thin film solar cell exhibits many other effects described in the specification. | 04-24-2014 |
20140109967 | THIN FILM SOLAR CELLS FOR WINDOWS BASED ON LOW COST SOLUTION PROCESS AND FABRICATION METHOD THEREOF - Disclosed is a bifacial thin film solar cell that is applicable to a BIPV window, particularly a bifacial CIGS thin film solar cell that can generate electricity by both sunlight and indoor illumination due to its ability to absorb light at both front and rear sides. According to several embodiments, visible light in a particular wavelength region can be transmitted through the semi-transparent thin film solar cell. In addition, high stability and safety of the thin film solar cell can be ensured because there is no need to use organic materials and liquid electrolytes. Furthermore, the fabrication cost of the thin film solar cell can be reduced by a low cost solution process. The thin film solar cell exhibits various other effects described in the specification. | 04-24-2014 |