# US 8,541,783 B2 · Electric double-layer capacitor and solar power generation device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,783 B2 - Document ID: US8541783B2 - Status: Granted - Kind: B2 - Application number: 13/196,345 - Filed: 2011-08-02 - Published: 2012-02-09 - Granted: 2013-09-24 - Earliest claimed: 2010-08-04 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Yumiko Saito; Junpei Momo; Rie Matsubara; Kuniharu Nomoto; Hiroatsu Todoriki - Inventors: Yumiko Saito; Junpei Momo; Rie Matsubara; Kuniharu Nomoto; Hiroatsu Todoriki - Web page: https://patentgrep.com/patent/US8541783B2 ## CPC - H01G 11/08: Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component - H01G 11/28: arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives - H01G 11/32: Carbon-based - H01G 11/54: Electrolytes - H01G 11/56: Solid electrolytes, e.g. gels; Additives therein - H01G 11/68: characterised by their material - H01G 11/74: Terminals, e.g. extensions of current collectors - Y02E 10/50: Photovoltaic [PV] energy - Y02E 60/13: Energy storage using capacitors - Y02E 70/30: Systems combining energy storage with energy generation of non-fossil origin - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present invention relates to a solar power generation device which includes an electric double-layer capacitor and a solar cell. The electric double-layer capacitor includes a pair of current collectors formed using a light-transmitting conductive material; active materials which are dispersed on the pair of current collectors; a light-transmitting electrolyte layer which is provided between the pair of current collectors; and a terminal portion which is electrically connected to the current collector. The solar cell includes, over a light-transmitting substrate, a first light-transmitting conductive film; a photoelectric conversion layer which is provided in contact with the first light-transmitting conductive film; and a second light-transmitting conductive film which is provided in contact with the photoelectric conversion layer. The electric double-layer capacitor and the solar cell are electrically connected to each other through the terminal portion, the first light-transmitting conductive film, and the second light-transmitting conductive film. ## Claims ### Claim 1 An electric double-layer capacitor comprising: a first current collector including a light-transmitting conductive material; a second current collector including a light-transmitting conductive material; first active materials comprising activated carbon or a polyacenic material, which are dispersed on a surface of the first current collector; second active materials comprising activated carbon or a polyacenic material, which are dispersed on a surface of the second current collector; and a light-transmitting electrolyte layer between the first current collector and the second current collector so that the first active materials and the second active materials are provided on the light-transmitting electrolyte layer side, wherein the first active materials and the second active materials are partially provided so that the electric double-layer capacitor does not lose a light-transmitting property, and wherein the first active materials and the second active materials are embedded within the light-transmitting electrolyte layer. ### Claim 2 (depends on 1) The electric double-layer capacitor according to claim 1, wherein the light-transmitting conductive material is selected from any one of water-dispersible polyester, indium tin oxide, indium tin oxide containing silicon oxide, organoindium, organotin, zinc oxide, indium zinc oxide containing zinc oxide, zinc oxide doped with gallium, tin oxide, indium oxide containing tungsten oxide, indium zinc oxide containing tungsten oxide, indium oxide containing titanium oxide, and indium tin oxide containing titanium oxide. ### Claim 3 (depends on 1) The electric double-layer capacitor according to claim 1, wherein the light-transmitting electrolyte layer includes polyethylene oxide or polypropylene oxide. ### Claim 4 (depends on 1) The electric double-layer capacitor according to claim 1, further comprising a light-transmitting exterior material to surround the first current collector, the second current collector and the light-transmitting electrolyte layer. ### Claim 5 A solar power generation device comprising: an electric double-layer capacitor comprising: a first current collector including a light-transmitting conductive material; a second current collector including a light-transmitting conductive material; first active materials comprising activated carbon or a polyacenic material, which are dispersed on a surface of the first current collector; second active materials comprising activated carbon or a polyacenic material, which are dispersed on a surface of the second current collector; a light-transmitting electrolyte layer between the first current collector and the second current collector so that the first active materials and the second active materials are provided on the light-transmitting electrolyte layer side; and a terminal portion which is electrically connected to the first current collector, wherein the first active materials and the second active materials are partially provided so that the electric double-layer capacitor does not lose a light-transmitting property, and wherein the first active materials and the second active materials are embedded within the light-transmitting electrolyte layer; and a solar cell comprising: a first light-transmitting conductive film over a light-transmitting substrate; a photoelectric conversion layer in contact with the first light-transmitting conductive film; and a second light-transmitting conductive film in contact with the photoelectric conversion layer, wherein the electric double-layer capacitor and the solar cell are electrically connected to each other through the terminal portion, the first light-transmitting conductive film, and the second light-transmitting conductive film. ### Claim 6 (depends on 5) The solar power generation device according to claim 5, wherein the light-transmitting conductive material and a material of the first light-transmitting conductive film and the second light-transmitting conductive film are selected from any one of water-dispersible polyester, indium tin oxide, indium tin oxide containing silicon oxide, organoindium, organotin, zinc oxide, indium zinc oxide containing zinc oxide, zinc oxide doped with gallium, tin oxide, indium oxide containing tungsten oxide, indium zinc oxide containing tungsten oxide, indium oxide containing titanium oxide, and indium tin oxide containing titanium oxide. ### Claim 7 (depends on 5) The solar power generation device according to claim 5, wherein the light-transmitting electrolyte layer includes polyethylene oxide or polypropylene oxide. ### Claim 8 (depends on 5) The solar power generation device according to claim 5, wherein the photoelectric conversion layer is any of an amorphous semiconductor layer, a polycrystalline semiconductor layer, and a microcrystalline semiconductor layer. ### Claim 9 (depends on 5) The solar power generation device according to claim 5, wherein the photoelectric conversion layer includes a p-type semiconductor layer, an intrinsic semiconductor layer, and an n-type semiconductor layer. ### Claim 10 (depends on 5) The solar power generation device according to claim 5, wherein the electric double-layer capacitor and the solar cell are adhered to each other with a light-transmitting adhesive. ### Claim 11 (depends on 5) The solar power generation device according to claim 5, further comprising a light-transmitting exterior material to surround the first current collector, the second current collector and the light-transmitting electrolyte layer. ### Claim 12 A solar power generation device comprising: an electric double-layer capacitor comprising: a first current collector including a light-transmitting conductive material; a second current collector including a light-transmitting conductive material; first active materials comprising activated carbon or a polyacenic material, which are dispersed on a surface of the first current collector; second active materials comprising activated carbon or a polyacenic material, which are dispersed on a surface of the second current collector; a light-transmitting electrolyte layer between the first current collector and the second current collector so that the first active materials and the second active materials are provided on the light-transmitting electrolyte layer side; and a terminal portion which is electrically connected to the first current collector, wherein the first active materials and the second active materials are partially provided so that the electric double-layer capacitor does not lose a light-transmitting property, and wherein the first active materials and the second active materials are embedded within the light-transmitting electrolyte layer; and a solar cell comprising: a first light-transmitting conductive film over a light-transmitting substrate; a photoelectric conversion layer in contact with the first light-transmitting conductive film; and a second light-transmitting conductive film in contact with the photoelectric conversion layer, wherein the electric double-layer capacitor and the solar cell are overlapped with each other, and wherein the first current collector and the second light-transmitting conductive film are electrically connected to each other through the terminal portion. ### Claim 13 (depends on 12) The solar power generation device according to claim 12, wherein the light-transmitting conductive material and a material of the first light-transmitting conductive film and the second light-transmitting conductive film are selected from any one of water-dispersible polyester, indium tin oxide, indium tin oxide containing silicon oxide, organoindium, organotin, zinc oxide, indium zinc oxide containing zinc oxide, zinc oxide doped with gallium, tin oxide, indium oxide containing tungsten oxide, indium zinc oxide containing tungsten oxide, indium oxide containing titanium oxide, and indium tin oxide containing titanium oxide. ### Claim 14 (depends on 12) The solar power generation device according to claim 12, wherein the light-transmitting electrolyte layer includes polyethylene oxide or polypropylene oxide. ### Claim 15 (depends on 12) The solar power generation device according to claim 12, wherein the photoelectric conversion layer is any of an amorphous semiconductor layer, a polycrystalline semiconductor layer, and a microcrystalline semiconductor layer. ### Claim 16 (depends on 12) The solar power generation device according to claim 12, wherein the photoelectric conversion layer includes a p-type semiconductor layer, an intrinsic semiconductor layer, and an n-type semiconductor layer. ### Claim 17 (depends on 12) The solar power generation device according to claim 12, wherein the electric double-layer capacitor and the solar cell are adhered to each other with a light-transmitting adhesive. ### Claim 18 (depends on 12) The solar power generation device according to claim 12, further comprising a light-transmitting exterior material to surround the first current collector, the second current collector and the light-transmitting electrolyte layer.