成果報告書詳細
管理番号20130000000549
タイトル*平成24年度中間年報 太陽エネルギー技術研究開発 太陽光発電システム次世代高性能技術の開発 三層協調界面構築による高効率・低コスト・量産型色素増感太陽電池の研究開発(高効率化技術及びメカニズム解析に関する研究開発)
公開日2015/4/25
報告書年度2012 - 2012
委託先名国立大学法人信州大学
プロジェクト番号P07015
部署名新エネルギー部
和文要約
英文要約Title: Research and development of high-efficiency and low-cost dye-sensitized solar cells and their mass production technologies based on the three phase-harmonized interface (FY2010-2014) FY2012 Annual Report

A new series of Ru complex dyes based on black dye were designed and synthesizes. Among the dyes, a dye containing tris-phynyl amine showed higher absorption coefficients and higher short-circuit current than those of black dye. The efficiencies were also varies by employing mixed solvent. For black dye, we have examined the effect of dye solution immersion temperature and also the effect of co-adsorption with an organic dye, D35. However, we could not find any positive effect in comparison to the standard procedure and the single dye sensitization.
In order to reduce potential difference between redox potential of the redox couple and dye's HOMO level, cobalt redox couples have been paid attention. We have developed various organic dyes and one of them, MK-34, showed good compatibility with a cobalt redox couple. However, the diffusion resistance of the Co redox couples was found to be high. Then, we reduced the thickness between the dyed-electrode and Pt electrode and then we obtained 9.3 % energy conversion efficiency. This is one of the highest efficiency among the cells employing metal-free organic dyes. We have further examined the combination of various bulky organic dyes and Co complex redox couples having different redox potential. One of them showed a high potential to obtain 1 V with just a small decrease of short-circuit current, and the cell structure is currently under optimization. Finally we examined preliminary stability test for solar cells using Co complex redox couple. Up to 90 dyes stored at room temperature in the dark, no significant degradation was found, showing possibility of long stability.
In summary, we found that issues for the dyes based on black dye are the lower adsorption density and their interaction with acceptor species. Thus, new structures avoiding these issues are under investigation. For the combination of organic dyes and Co redox couple, tris-phynyl amine based dyes showed better performance than carbazole based dyes in terms of dye-cation reduction.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る