| Summary: | 碩士 === 元智大學 === 化學工程與材料科學學系 === 98 === The present work investigated the influence of preparation factors on the performance of dye-sensitized solar cells (DSSCs). In this study, multi-layered titania (particle size: 10–20 nm) layers and Pt layers serve as semiconductor and counter electrodes, respectively. To enhance the performance of DSSCs, five parameters affecting the performance were proposed, including active area, layer number, electrolyte type, Pt counter electrode, and addition of reflection layer. It has shown that these parameters act crucial roles in determining the photoelectric conversion efficiency of solar cells. On the basis of the experimental results, the combination of each factor efficiently displays an efficiency improvement. The optimal parameter setting includes active area: 0.49 cm2, layer number: 4, dye type: N719 , electrolyte type: 0.6 M LiI , 0.03 M I2, 0.5 M surfactant (tributyl phosphate, TBP ) , (solvent: 3-methoxypropionitrile , MPN) , Pt counter electrode (current density: 20 mA; supptering time: 20 s), and one reflection layer. Such configuration of the DSSC exhibits the efficiency as high as 4.14%. Accordingly, the parameter setting would provide a standard procedure for assembly of DSSCs with high light conversion efficiency.
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