Electrophoretic Deposition of TiO2 Films for Dye-Sensitized Solar Cells

• Main Authors: Yen-YuChu, 朱彥宇
• Other Authors: Hsisheng Teng
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/67739983625349089063

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 98 === The charge transfer rate in the nanocrystalline TiO2 electrode govern the performance of a dye-sensitized solar cell(DSSC). In this study, TiO2 colloids derived from a titanate-directed route and used to prepare electrode by two methods: Paste-coating and Electrophoretic Deposition. Nitrogen absorption-desorption and SEM was used to analysis the pore and electrode morphology. In order to compare the difference of charge transfer, IMPS, IMVS, and EIS were used. By the analysis of nitrogen absorption-desorption and SEM, electrophoretic solution has higher surface area, and the electrode morphology was dense packing. Cell performance of electrophoretic electrode was better than paste-coating because of its high current density. IMPS showed a higher electron transfer rate for electrophoretic electrode, but the electron lifetime is shorter by the IMVS analyzing. In EIS testing, the charge collection efficiency and diffusion length were 91% and 43?m, respectively. The dense packing caused the much more dye to absorb, decreased the path for electron transfer, so electrophoretic electrode has higher charge collection efficiency, current density, and lower open-circuit voltage.