成果報告書詳細
管理番号20130000000525
タイトル*平成24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 電荷分離・輸送・貯蔵ポリマーの複合機能制御と新型湿式太陽電池の創出
公開日2014/6/11
報告書年度2012 - 2012
委託先名学校法人早稲田大学
プロジェクト番号P09026
部署名新エネルギー部
和文要約
英文要約Founding Program for World-Leading Innovative R&D on Science and Technology (FIRST-Program). Development of Organic Photovoltaic toward a Low-Carbon Society: Sub-project No.4 “Charge-Separation, -Propagation, and -Storage Functions of Redox Polymers and their Application to Photovoltaic Cells”
 
In this project, nitroxide radical derivatives including their polymers, such as 2,2,6,6-tetramethylpiperidine-1-oxy (TEMPO) and TEMPO-substituted polymers, organic redox molecules, and metal complexes were applied to dye-sensitized solar cells (DSSCs) as redox mediator electrolytes. The results were summarized as following.
Vanadyl complexes were examined in the DSSC as a mediator. VO complexes exhibiting electrochemically reversible redox capability and suitable potential for dye-regeneration were applied to dye-sensitized solar cells as a mediator. The optimized cell composed of the VO complex-based electrolyte accomplished 5.4 % of conversion efficiency.
For the nitroxide radical-based electrolytes, titania electrodes were optimized by changing their particle size and thickness, and indoline ye-sensitizer exhibiting wide range absorption around visible region was applied. The electrode having high porosity and thick photo- absorption layer was suitable for the TEMPO mediator. IPCE of the cell with the electrode absorbed the lindoline dye cocktail was beyond 70 % in the visible region. This result strongly supported the improvement of short circuit current density (Jsc = 13.6 mA/cm2). The conversion efficiency of the cell reached to 8.0 %.
To achieve a pseudo-solid state DSSC, PVDF-HFP was added to the TEMPO-based electrolyte as the gelator. The diffusion coefficient value for TEMPO in the gel-electrolyte was ca. 10-6 cm2/s, the value was enough high for the redox mediation in the DSSC. The cell with gel-besed electrolyte accomplished almost the same conversion efficiency as the cell using solution electrolyte.
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