The effect of TiCl₄-treated TiO₂ compact layer on the performance of dye-sensitized solar cell

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• 作者：Hongsik Choi ; Changwoo Nahm ; Jongmin Kim ; Joonhee Moon ; Seunghoon Nam ; Dae-Ryong Jung ; Byungwoo Park ; ^{byungwoo@snu.ac.kr}
• 关键词：Dye-sensitized solar cells ; Compact layer ; Blocking layer ; TiCl4 treatment ; Solar cells
• 刊名：Current Applied Physics
• 出版年：2012
• 出版时间：May, 2012
• 年：2012
• 卷：12
• 期：3
• 页码：737-741
• 全文大小：814 K

文摘

In order to prevent the charge recombination at the interface between the transparent-conducting oxide (TCO) substrate and electrolyte, a TiO₂ compact layer was deposited on the substrate by hydrolysis of TiCl₄ aqueous solution. Optimum thickness of the compact layer was found to be ?5?nm, which showed ?4 % increase in the power-conversion efficiency compared with the bare cell. Impedance spectra indicated that the interfacial charge-transfer resistance of TCO/electrolyte interface was increased by more than a factor of three with the TiO₂ compact layer at 0.4?V. Moreover, the electron-carrier lifetime of the 25?nm-deposited cell was improved by a factor of five compared with the bare cell.