Dye adsorption for dye-sensitized solar cell

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• 作者：Takuya Yuasa ; Ryo Kawakami ; Yuuki Sato ; Yasushige Mori ; Motonari Adachi ; Shinzo Yoshikado ; ^{syoshika@mail.doshisha.ac.jp}
• 关键词：Dye-sensitized solar cells ; Dye adsorption ; Eosin Y ; TiO2 thin film ; Electrophoresis ; Immersion
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：2012
• 期刊代码：81_09270248
• 类别：ce
• 出版时间：July, 2012
• 卷：102
• 期：Complete
• 页码：2-7
• 文件大小：1477 K

摘要

Homogeneous dye adsorption and deep penetration into a titanium dioxide (TiO₂) thin film of the negative electrode in a dye-sensitized solar cell were the main factors to obtain high performance. A dye is typically adsorbed by soaking the TiO₂ film in a dye solution. A long immersion time is needed to adsorb the dye and it is also difficult to adsorb the dye to the depth of the TiO₂ thin film in a short time. In this study, electrophoresis was used to solve these problems. A dye solution of water or ethanol in which Eosin Y dissolves behaves like a colloid. The adsorption time needed to adsorb a specified amount of dye was shortened by the electrophoresis compared to immersion. An optimum concentration, current density and electrophoresis time exist for better conversion efficiency of the dye-sensitized solar cell (DSSC) when the dye molecules are absorbed by electrophoresis. Thus, electrophoresis is effective to adsorb Eosin Y on the TiO₂ thin film.