PHOTOELECTRIC CONVERSION ELEMENT AND DYE-SENSITIZED SOLAR BATTERY INCLUDING THE SAME

• Main Authors: KASAHARA MEGUMI, FUKUI ATSUSHI, YAMANAKA RYOSUKE, YOSHIE TOMOHISA
• Format: Patent
• Language: English; Japanese
• Published: 09.03.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

PROBLEM TO BE SOLVED: To provide: a photoelectric conversion element having a photoelectric conversion efficiency higher than that of a conventional one; and a dye-sensitized solar battery including such a photoelectric conversion element.SOLUTION: A photoelectric conversion element comprises a first support body including an optically transmissive material, a first conductive layer, a photoelectric conversion layer, an insulator layer, a catalyst layer, a second conductive layer, an electrolyte-holding layer and a second support body in this order. The photoelectric conversion layer includes a porous semiconductor having cavities and a dye adsorbed inside the cavities of the porous semiconductor. The electrolyte-holding layer includes an electrolyte. The photoelectric conversion layer and insulator layer each have a porous structure having cavities. The cavities of the photoelectric conversion layer and insulator layer communicate to inside the electrolyte-holding layer, and are filled with the electrolyte. Supposing that the distance between the second conductive layer and second support body is D2, the total film thickness of the photoelectric conversion layer and insulator layer is D1, the whole average porosity of a layer including the photoelectric conversion layer, insulator layer, catalyst layer and second conductive layer is P(%), and D2/{(P/100)×D1} is α, α is 0.5-2.0.SELECTED DRAWING: Figure 1 【課題】従来よりも高い光電変換効率を有する光電変換素子、および、それを備える色素増感太陽電池を提供すること。【解決手段】本発明は、光透過性の材料からなる第１支持体と、第１導電層と、光電変換層と、絶縁層と、触媒層と、第２導電層と、電解液保持層と、第２支持体とを、この順で備える光電変換素子である。光電変換層は、複数の空隙を有する多孔質半導体と、多孔質半導体の複数の空隙の内部に吸着した色素とを含み、電解液保持層は電解液を含み、光電変換層および絶縁層は複数の空隙を有する多孔質構造を有し、光電変換層および絶縁層の複数の空隙は、電解液保持層の内部に連通し、電解液で満たされており、第２導電層と第２支持体との間の距離をＤ２、光電変換層と絶縁層との合計の膜厚をＤ１、光電変換層、絶縁層、触媒層及び第２導電層からなる層全体の平均空隙率をＰ（％）とし、Ｄ２／{（Ｐ／１００）・Ｄ１}をαとしたときに、αが０．５以上２．０以下である。【選択図】図１