Effect of N Dopant Amount on the Performance of Dye-Sensitized Solar Cells Based on N-Doped TiO2 Electrodes

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• 作者：Wei Guo ; Yihua Shen ; Liqiong Wu ; Yurong Gao ; Tingli Ma
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：November 3, 2011
• 年：2011
• 卷：115
• 期：43
• 页码：21494-21499
• 全文大小：906K
• 年卷期：v.115,no.43(November 3, 2011)
• ISSN：1932-7455

文摘

We investigated the effect of varying amounts of N dopant on the performance of dye-sensitized solar cells (DSCs) based on the N-doped TiO₂ electrodes. An interesting hierarchically macro-/mesoporous N-doped TiO₂ structure with parallel macro-channels was formed by a simple template-free wet method. A series of N-doped TiO₂ electrodes with varying N dopant amounts were fabricated for the DSCs. The N-doped DSCs achieve an overall conversion efficiency of 5.01鈥?.27%. The enhancement in the photocurrent density of N-doped DSCs was from 9% to 46% compared with undoped DSCs. The significantly enhanced photocurrent of the devices was found to be related to the N dopant amount and dye uptakes in N-doped TiO₂ electrodes. The optimal N dopant amount for the N-doped TiO₂ electrodes was 0.40%. Moreover, the charge transfer resistances demonstrated dependency on the N dopant amount. The electron lifetime of N-doped DSCs tended to decrease as the N dopant increased.