成果報告書詳細
管理番号20110000000606
タイトル*平成22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/高効率有機薄膜太陽電池の作製(有機薄膜太陽電池のエネルギー変換効率向上および高耐久化に関する研究開発)
公開日2011/8/5
報告書年度2010 - 2010
委託先名JX日鉱日石エネルギー株式会社
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 1.1 研究開発の内容 有機薄膜太陽電池は、印刷法やスピンコート法など湿式法を駆使した製造ができるなど大きな特長を有する。高温、高真空などの高コスト要因プロセスが不要となるため、飛躍的な低コスト化が可能な将来の新規太陽電池として嘱目され、現在、米国、日本、欧州を中心に活発な研究開発が進められている。しかし、従来の無機太陽電池と比べて電変換効率がまだ5~6%程度と低く、また実用耐久性も改善途上であり、これらの課題が克服されれば、将来、種々の太陽電池群の中で有機薄膜太陽電池は、次世代低コスト太陽電池として重要な一翼を担うと期待される。
英文要約Title: Funding Program for World-Leading Innovative R&D on Science and Technology / Development of organic photovoltaics toward a low-carbon society / Research and Development of Organic Thin-Film Solar Cells and their Organic Semiconductors
(FY2010-FY2011) FY2010 Annual Report
To improve the stability and the power conversion efficiency of organic thin-film solar cells, we have been focusing on the following three topics: 1) Understanding of influencing factors on stability. 2) Improvement of the device stability. 3) Improvement of the power conversion efficiency.1) Understanding of influencing factors on stability and Improvement of the device stability. Thermal testing results of encapsulated cells show that the degradation rate increased with increasing the testing temperature. We have tested several cell fabrication conditions which were combined with a number of encapsulating materials and photo-active materials, then successfully obtained excellent stability of less than 10% in power conversion efficiency after 1000hrs for thermal testing at 85℃ by proper selection of encapsulation and photo-active materials, The humidity test (85℃,85%RH) degraded the cell performance more largely than the thermal stability test (85℃). The in-plane photo-response distribution by LBIC (Laser Beam Induced Current) before and after humidity tests suggested that the degradation was caused by water penetrating into the cell active area through the peripheral part. To improve the stability of the cell, we will consider cell structures with moisture-insensitive property. A SIMS measurement of a light-soaked device (1SUN, continuous illumination) showed that Li ion using as an electrode material was migrated into active area. We designed and introduced an outdoor testing system to measure device performances both commercially available PV modules and the modules developed ourselves, and to compare the testing conditions between outdoor and indoor by measuring. 2) Improvement of device performance We developed a cell with the moisture-insensitive electrode after investigations of the fabrication condition of the cell, which had an equivalent photovoltaic performance to the cell with the usual electrode. To fabricate integrated module, we have surveyed patterning methods and tested. UV laser enabled to scribe photo-active layers on a substrate and we found that we could successfully pattern fine structure on a 100 micron scale.
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