色素増感型太陽電池の将来展望(<特集>太陽電池開発の将来展望)

概要

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Dye-sensitized solar cells (DSCs) have been closed-up as less expensive PV module in coming next PV generation. The less expensive module cost is expected due to the popular materials and easier manufacturing process, etc. Therefore advantages of Life-Cycle-Assessment (LCA) and Energy-Payback-Time (EPT) over Si PV module will be realized. We had developed large-scale PV modules of dye-sensitized solar cells (DSCs) for outdoor use and the real outdoor performances were monitored for a half year, and clarified that the advantages of DSCs against Si solar cells for practical use under natural insolation condition. To elucidate the challenges toward higher conversion efficiency, higher durability, lower cost for practical use and various applications, we have fabricated some different types of DSC modules. We have fabricated the small DSC modules including series-parallel connection of cells on a TCO glass to elucidate the intrinsic stability of the components of DSCs, and have conducted the longer outdoor exposure tests under working conditions. The longest intrinsic stability data of DSC module in the world under the outdoor working condition for almost 2.5 years was successfully obtained. The electrochemical impedance spectroscopy of the unit cell revealed that the degradation of cell performance was mainly due to the change of the components in the electrolyte.
一般社団法人日本エネルギー学会の論文
2008-03-20