成果報告書詳細
管理番号20120000000531
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 低コスト色素増感太陽電池の製造と発電実証試験
公開日2013/6/25
報告書年度2011 - 2011
委託先名シャープ株式会社
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
現在、色素増感太陽電池のTCOレス構造については、各研究機関から報告がなされており、様々な構造が考えられているが、TCOガラスを用いた従来構造セルのレベルには至っていない。平成23年度は、TCOレス構造のスクリーニング検討を実施し、それぞれの構造での問題点を抽出する。種々のTCOレス構造では、TCOの替わりに形成する。集電電極の適正化と酸化チタン(TiO2)膜の形成の適正化が一つの開発ポイントとなる。そこで、集電電極の形成条件について、さらに検討をし、TCOレス構造に適用可能な集電電極構造を提案する。また、平成22年度の成果として明らかにしたTiO2構造の最適化もフィードバックする中で、TCOレス構造における性能向上の可能性を明確化する。
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 / Development of the manufacturing technology of low-cost dye sensitized solar cell and actual proof test of power generation:Energy Technology Laboratories:Center Sharp Corporation.
Introduction:The purposes of this research are development of dye-sensitized solar cells (DSCs) without transparent conducting oxide (TCO) glass. [Target (Period: end of FY 2011)] 1. Analysis of the degradation factor of short circuit current density for TCO less cells 2. Clarification of problematical point with respect to TCO less structure: Experiments and results 1. Screening analysis of TCO less structure: A TCO less cell was constructed by glass, TiO2/dye, electrode as a cathode, electrolyte and counter electrode. The cathode electrode was layered on porous TiO2 in case of TCO less cell. The differences between TCO less cells and conventional DSCs are two points, that are, a) absence of TCO on the light incident side glass, and b) existence of the electrode as a cathode on porous TiO2. From past examinations in FY 2010, we showed that Jsc degradation ratio could be improved up to 15% (38%-23%). In FY 2011, screening analysis of TCO less structure was investigated. Among the fabricated cell structures, the Jsc degradation ratio of sample 3 characteristics could be improved up to 14% (38%-24%). If it is supposed that the reflection ratio difference between TCO less cells and conventional DSCs is 2%, which is based on the FY 2010 result, it is possible to improve the Jsc degradation ratio up to 12% (38%-26%). 2. Rationalization of the cathode electrode: One of the important problems for the fabrication of TCO less cells was the optimization of the cathode electrode on the TiO2 layer. We investigated the effects of cathode electrode conditions on TCO less cell properties. As a result, it was necessary to have two features for the cathode electrodes; appropriate pores A) for the dye adsorption and B) for the electrolyte. From impedance analysis, the feature B was dominant as for the influence on fill factor. Therefore, the pores of the cathode electrode were fabricated by using laser scribing, mechanically, for the feature B. As a result, Jsc of TCO less cells with scribed cathode electrode was larger than that without scribed cathode electrode. It was found that using scribed cathode electrode was an important technique for improving Jsc of TCO less cell. Finally, we managed to obtain TCO less cells with a Jsc degradation ratio up to 2% by using these techniques.
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