| Summary: | 碩士 === 國立臺北科技大學 === 化學工程研究所 === 95 === In the present work, the interactions between N3, N719,and black dye sensitizers with nanocrystalline TiO2 film was investigared by DRIFTs-FTIR spectroscopy. Experimental results show that N3 and N719 dyes were anchored onto the TiO2 surface by bidentate or bridging mode using two carboxylic acid groups and one carboxylic acid group, respectively. Instead, black dye uses one carboxylate group through bidentate or bridging mode. Different active areas of working electrode (1, 0.49, 0.25cm2) were immersed into the dye solution and the efficiency of solar cell is 6.21% with the active area of 0.25 cm2.
In dye co-sensitization experiment, TiO2 electrodes were mixed with N3, N719, and black dye in various proportions, results demonstrated that multiple adsorption of dyes on TiO2 surface in different extent.
In-situ Raman scanning technique were implemented under real photocurrent conditions. Valuable information on the dye intramolecular interactions in the excited state as well as the interactions between dye-semiconductor electrodes were obtained. This information were interpreted to correlate the degradation mechanisms between their operation of conditions and their corresponded material properties.
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