| Summary: | 碩士 === 國立雲林科技大學 === 電子工程系 === 103 === Dye-sensitized solar cells (DSSCs) have been paid much attention recently because of low cost, simple process as compared to silicon solar cells that are of high cost and complicated process. To improve the photovoltaic performance of flexible DSSCs, this work has investigated the film coating conditions, the structures of the working electrode, and the materials for the electrolytes. In this work, both flexible ITO/PEN and ITO/PET have been used as the substrates for the flexible DSSCs. The flexible substrates have been pre-treated with baking to improve their electrical properties and light transmittance. For the DSSCs with TiO2 nanotubes and different colloids of TiO2 nano-particles as the working electrode, and added with TiO2 blocking layer, the best photovoltaic performance is: VOC = 0.71V, JSC = 4.76 mA/cm2, FF = 65.79%, and efficiency = 2.24%. For the DSSCs added with PVDF-HFP into the electrolyte as the solid electrolyte and added with P25 TiO2 nano-particles, the best photovoltaic performance has been improved as follows: VOC = 0.73V, JSC = 5.68 mA/cm2, FF = 63.71%, and efficiency = 2.63%.
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