科研之友
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摘要
Solar cells, being an effective solution for the energy crisis, have been investigated and being developed by researchers from all around the world. So far silicon solar cells have been developed mostly and used widely, with a conversion efficiency around 30%, but the production cost has always been putting limitations on daily use. As a cheaper solution for this, Dye sensitized solar cells (DSC) have attracted much more attention among the research community, yet the best reported power conversion efficiency is still very low as 12%. Many attempts are being taken to improve the efficiency of these cells. The main components of a DSC, namely transparent conducting oxide film, semiconductor thin film, sensitizer, electrolyte and counter electrode should be optimized in order to have the DSC perform well. Among these components, the semiconductor thin film is the most investigated component so far. For better performance, the semiconductor thin film should be porous, well-crystallized and should have inter-connected particle networks. As a better alternative to acetic acid which is used as a de-aggregating agent in TiO2 film formation process of Dye sensitized Solar Cells (DSC) when the spray pyrolysis deposition method is used, Salicylic acid was used. The cell characteristics, surface morphology and crystallinity of the films were investigated for different amounts of salicylic acid used with. The optimum concentration of Salicylic acid was found to be 0.1M, while that particular cell showed a V-OC of 0.77 V, a J(SC) of 12.19 mA, a fill factor of 0.69 and a conversion efficiency of 6.52%.
- 出版日期2013-10
