成果報告書詳細
管理番号20110000000881
タイトル*平成22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 高効率・高耐久性色素増感太陽電池モジュールの研究開発(色素増感太陽電池モジュール化技術と高耐久性化研究開発)
公開日2011/7/28
報告書年度2010 - 2010
委託先名株式会社フジクラ
プロジェクト番号P07015
部署名新エネルギー部
和文要約 色素増感太陽電池は、シリコン材料を使用しない太陽電池であり、高真空プロセスを必要とせず、スクリーン印刷により製造可能な為、大幅な低コスト化が期待される太陽電池である。本事業では、PV2030+に掲げられた2020年における太陽光発電による発電コスト目標14円/kWhを、色素増感太陽電池を用いた発電システムにおいて達成する為に、屋外利用可能かつ高効率な色素増感太陽電池モジュールの技術開発を行う。当事業ではモジュール化技術と高耐久性化研究開発をおこなう。
(1)大面積・高耐久性色素増感太陽電池モジュールの研究開発
変換効率(ac)=8%程度の5cm角サブモジュールでは、A-1, A-2, A-5, B-2の各試験において、初期値の99%以上の効率維持を達成。現在変換効率(ap)=8%のサブモジュールを用いて各試験について検討中。
 20cm角サブモジュールでは開口率の最適化を進め、高耐久性5cm角サブモジュールと同等の部材を用いて、前年度変換効率(ap) = 7.1%であった効率を8.3%まで向上。ただし、85℃, 85%RH試験では300時間で2割程度の効率低下。Ag配線部の腐食が認められたため、その製造工程・使用部材について改善検討中。
 スクリーン印刷の精度を改善することで、大面積50cm角モジュールの電極作製方法を確立。モジュールとしての効率・耐久性についての改善はH23年度検討予定。

(2) 高耐久性色素増感太陽電池モジュールの高効率化技術の研究開発
 色素吸着条件およびナノコンポジットイオンゲルの改善により、5cm角サブモジュールでの効率向上に成功。前年度条件で変換効率(ap) = 7.9%のサブモジュールで変換効率(ap) = 8.4%を達成(変換効率(ac)では9.6%)。この5cm角サブモジュールは開口率88%と最適化を行っていない状態のため、20cm角サブモジュールと同等の開口率改善を行うことで、変換効率(ap) = 9%がほぼ達成可能。
英文要約Title: New Energy Technology Development. Development of Next-generation High-performance Technology for Photovoltaic Power Generation System. Research and Development of Highly Efficient and Durable Modules of Dye-sensitized Solar Cells (FY2010-FY2012) FY2010 Annual Report
1. This R&D. The Dye-sensitized solar cell (DSC) can be prepared by screen-printing without needing a high vacuum process. Therefore, DSC is expected as a low-cost PV. Fujikura Co., Ltd. achieved less than 1% of relative efficiency declines by the JIS C8938 durability test using 5cm-by-5cm DSC. Moreover, we achieved 8.1% efficiency (active area) of 20cm-by-20cm DSC submodule made by durable materials. In this R&D, we will perform the technology development of the highly efficient DSC module which is durable outdoors for a long time. For the target in this R&D, the all DSC module achieves less than 10% of efficiency declines after the JIS C8938 test. After that, we achieve 8% of efficiency at 30cm-by-30cm DSC modules until 2012, and the 10% efficiency is the final aim until 2014. In order to establish above-mentioned targets, Fujikura conducted the research subjects described below. (1) "The R&D of a large area and the high durable DSC module" In this R&D, we perform technology development for the purpose of the high durable establishment that can endure outdoors use for a long term in DSC module having more than 30cm-by-30cm areas. (2) "The outdoor durable test of the DSC module" On this theme, we develop a manufacture technology of the large area DSC panel which connected DSC modules, for the practical use of DSC. Moreover, we carry out the outdoor actual proof test and examine properties change of the DSC in the practical use environment. (3) "The efficiency improvement technology development of the high durable DSC module" In this subject, we carry out various technology developments to achieve over 10% of conversion efficiencies about a high durable DSC module. 2. Results. (1) In this year, we investigated a performance change over 1,000 hours on the durability test of the 5cm-by-5cm DSC. As a result, performance deterioration produced in longer than 1,200 hours was confirmed among JIS C8938 humidity test (85 degC, 85%RH) although there was not an efficiency decline until 1,000 hours. It was confirmed that very few pinhole-shaped corrosion occurred in the silver wiring as this cause. In 2011, we will improve the process of manufacture to suppress this outbreak and develop a wiring protective layer without defect. Moreover, as the further enlargement of DSC module development, we developed the 50cm-by-50cm DSC module. Because the development of the component was main task of this year, efficiency of the modules is not yet enough values. However, using a component with the durability that was similar to the 5cm-by-5cm DSC mentioned above, 7.4% efficiency (aperture area) was provided by the unit cell. (2) We are going to carry out the outdoor test from 2012. (3) Using a 5cm-by-5cm DSC, we investigated titania photoelectrode structure, electrolyte composition, dye purification and dye adsorption conditions. As result of this this year, we achieved 9.6% efficiency (avtive area) by the 5cm-by-5cm DSC using nanocomposite ion gel.
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