成果報告書詳細
管理番号20120000000522
タイトル*平成23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2013/7/27
報告書年度2011 - 2011
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
和文要約和文要約等以下本編抜粋:1.研究開発の内容及び成果等 東京大学では、共同実施先の桐蔭横浜大学、九州工業大学、ソニー株式会社と共に、今年度は5つのサブテーマについて以下の項目を実施した。サブテーマ1「有機系太陽電池の実用化に向け、新概念、新素材、新構造に関わる基盤研究」1-1 「高耐久性有機系太陽電池の開発」色素増感太陽電池の中でも高い光電変換効率を示すものには主に液体電解質が用いられており、その蒸発などが色素増感太陽電池の耐久性低下の要因となっている。高い光電変換効率を維持しつつ、電解質を固体化する技術の開発を目指し、ナノクレイを用いた電解質の固体化および有機無機ハイブリッド太陽電池の開発を行った。
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: Pioneering Next Generation Solar Cell Technologies and Industries via Multi-manufacturer Cooperation (FY2010-FY2013) FY2011 Annual Report
Following sub-theme researches have been performed at the University of Tokyo, Toin University of Yokohama, Kyushu Institute of Technology, and Sony Co. Ltd. The sub-theme 1 is the fundamental research about new concepts, new materials, and new structures for practical organic photovoltaics. Item 1-1 is the development of highly-durable organic photovoltaics. Nano-clay powder, which was added as a gelator to make quasi-solid electrolyte, proved to work as a catalyst to enhance electron transfer, resulting higher performance dye-sensitized solar cells (DSSCs) than liquid electrolyte. Toward the development of organic-inorganic hybrid solar cells, performance of polymer-sensitized solar cells has been improved up to 4.0% by regulating the hydrolysis ratio of the carboxyl groups from their ester derivatives. To fabricate standardized test cells automatically, facilities have been designed and installed. Item 1-2 is the improvement of photoelectric conversion efficiency of organic photovoltaics: development of novel organic dyes with photo-absorption at long wavelengths. Several porphyrin dyes have been investigated. The Voc of DSSC using terpyridine-Ru complexes with a phosphine derivative ligand, which exhibited very high Jsc last year, has been improved by the extension of alkyl chain length on the phosphine ligand. Tandem solar cell using DX1 and N719 afforded photoelectric conversion efficiency of 11.5%. Item 1-3: the development of rechargeable solar cells, and item 1-4: the establishment of international standard for organic photovoltaics have been also performed. The sub-theme 3 is the development of highly-efficient solar cells using organic-inorganic hybrid junction. Lead halide perovskite nanocrystals have been investigated as inorganic sensitizers. Organic hole transporting layers have been prepared by controlled vacuum deposition to make all solid solar cells with high output voltage. The sub-theme 5 is the basic science for organic photovoltaics by theoretical chemistry. The spin-forbidden transition seen in terpyridine-Ru complex dyes has been reproduced by developing novel theory for photo-absorption with spin-orbital coupling, which cannot be treated with a conventional method. The sub-theme 9 is the confirmation of the function of TCO-less tandem DSSCs. To utilize IR dyes, structure of photoanode using tin oxide has been optimized. Adsorption dynamics of dyes and co-adsorbents has been investigated with QCM-based instruments. The sub-theme 11 is the development of elemental techniques for the improvement of efficiency of DSSCs. For the development of materials and module preparation, several materials have been investigated and facilities for their evaluation have been installed. The cocktail effect was confirmed for the dye DX1 from the University of Tokyo. The improvement of photocurrent by keeping the cell was analyzed to be derived from re-orientation of the dye molecules.
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