成果報告書詳細
管理番号20130000000523
タイトル*平成24年度中間年報 最先端研究開発支援プログラム 低炭素社会に資する有機系太陽電池の開発 サブテーマ1・3・5・9・11
公開日2014/5/9
報告書年度2012 - 2012
委託先名国立大学法人東京大学
プロジェクト番号P09026
部署名新エネルギー部
和文要約
英文要約Title: Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST program). Development of Organic Photovoltaics toward a Low-Carbon Society (FY2010-FY2013) FY2012 Annual Report

Following subjects have been developed at the University of Tokyo, Toin University of Yokohama, Kyushu Institute of Technology, and Sony Co. Ltd. In the sub-theme 1, fundamental studies have been performed together with the development of materials and modules to achieve highly efficient and highly durable dye-sensitized solar cells. In the item 1-1-1, novel dyes and electrolytes have been developed to enhance the efficiency. By the modification of DX1, which exhibits broad and high quantum efficiency derived from S-T transition, the absorption and IPCE onset have been extended to the longer wavelengths. By alkylation or esterification of the Ru-terpyridyl complexes with a phosphine ligand, higher photovoltages have been achieved. The photoelectric conversion efficiency exceeded 10% under lower illumination, such as 0.36 sun. To get higher photovoltage, bromide-based electrolytes have been investigated using porphyrins as sensitizers, and Voc 0.94 V was achieved. In the item 1-1-2, materials to improve the durability, such as nano-clay powder for quasi-solid electrolyte, polymers for organic-inorganic hybrid solar cells, have been studied. By the use of nano-clay, efficiency 11% was achieved. The performance of polymer-sensitized solar cells has been improved up to 5.2%. Fabrication of 10 cm square cells has been almost optimized. In the item 1-1-3, two-electrode type rechargeable solar cells have been developed, instead of three-electrode types. In the item 1-2, fundamental studies to reveal the power-generation mechanism of organic photovoltaics have been performed using theoretical chemistry. The reaction of iodide redox mediator with DX dye in solution, the structure and properties of dicyanomethylene compounds on TiO2 surface, and the surface structure of TiO2 using periodic boundary conditions have been investigated. In the item 1-5, some low-cost processes have been developed. Dye-adsorption behaviors and the interaction between dyes and redox mediators were studied with QCM. In the item 1-6, material development and module development have been performed to enhance the efficiency of organic photovoltaics. Jsc 26mA/cm2 was achieved using DX1 at small test cell. In the sub-theme 3, basic studies for innovative solar cells as the hybrid of dye-sensitized solar cells and organic thin-film solar cells have been performed. In the item 3-2-1, high-voltage, wide-latitude organic-inorganic hybrid solar cells have been studied. By the preparation of complexes at the TiO2 surface and by the use of perylene as the hole transporter, Voc 1.18 V was achieved. In the item 3-2-2, alkylammonium metal halide perovskite materials have been investigated as sensitizers. By the use of organic hole transporter and porous alumina supports, 10.9% efficiency, which is the highest value for solid-state hybrid solar cells, was achieved. In the sub-theme 4, the activities to establish international standard have been promoted.
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