成果報告書詳細
管理番号20130000000566
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 有機薄膜太陽電池モジュール創製に関する研究開発(高分子系有機薄膜太陽電池モジュールの研究開発)
公開日2015/4/25
報告書年度2012 - 2012
委託先名住友化学株式会社
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 : High Performance PV Generation System for the Future. Development of module of organic thin-film solar cell(Sub-theme : Development of module of organic thin-film solar cell using conjugated polymer) (FY2010-FY2014) FY2012 Annual Report
 
In order to achieve the national target for introducing photovoltaic power generation system of 53GW by 2030, inexpensive and less-resource-limitation organic thin film solar cell (OPV) modules are going to be investigated and developed. The intermediate target performances in 2012 are cell efficiency of 8%, module efficiency of 6% and relative efficiency drop of less than 10% (Japanese Industrial Standards C8938) as durability. The final target performances in 2014 are cell efficiency of 12%, module efficiency of 10% and relative efficiency drop of less than 10% (Japanese Industrial Standards C8938) as durability. Five organizations including Sumitomo Chemical cooperate to achieve the objective. Sumitomo Chemical is in charge of the research and development of the OPV modules using conjugated polymers. Specifically, the policy for research and development is as follows:. (1) Creation of composition from materials for high efficiency photoelectric conversion materials. (2) Development of production technology for high-performance and large-size modules
We continued trying to achieve the high efficiency photoelectric conversion based on the low band gap polymers having 900nm absorption edge wavelength, called polymer A, by which larger efficiency than 15% would potentially be expected. We have so far reported that efficiency of 8.6% was achieved by morphology control with organic solvent, high-molecular weight of polymer A and modification of the side chain. In this year we tried to achieve the higher efficiency by improvement of FF loss caused by external interconnecting resistance and by decreasing transmitted light loss, based on the analysis of the photoelectric conversion loss. As a result, we successfully achieved our best efficiency of 9.8%.
Regarding the development of tandem cells, by which we could expect higher efficiency because of use of wide range of light, we have reported efficiency of 8.5% (1cm2) measured at AIST last year. In this year, we tried to achieve the higher efficiency by using our own long-wavelength absorption polymer A as a back cell material and our own short-wavelength absorption polymer D as a front cell material, and by optimization of film thickness. As a result, we successfully achieved higher efficiency of 10% (1cm2) measured at Sumitomo Chemical, which exceeds the intermediate target of this project.
Regarding the development of modules, we have so far reported efficiency of 4.2%(ap)(aperture ratio: 80%) of sub-module with 20cm x 20cm size. In this year, we achieved efficiency of 5.2%(ap) measured at AIST by improving FF (from 0.477 to 0.642) by reducing resistance of the transparent electrode. This result was published in the solar cell efficiency tables (version 40)(Prog. Photovolt: Res. Appl. 2012; 20:606-614)as the world record of OPV sub-module at that time. Furthermore, we achieved the efficiency of 6.4%(ap) measured at Sumitomo Chemical by improving aperture ratio and increasing uniformity of the film thickness.
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