Enhanced stability of photocurrent-voltage curves in Ru(II)-dye-sensitized nanocrystalline TiO2 electrodes with carboxylic acids

被引：103

作者：

Kang, TS ^{[1
]}

Chun, KH ^{[1
]}

Hong, JS ^{[1
]}

Moon, SH ^{[1
]}

Kim, KJ ^{[1
]}

机构：

[1] Korea Univ, Dept Chem, Seoul 136701, South Korea

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2000年 / 147卷 / 08期

关键词：

D O I：

10.1149/1.1393646

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The variation of photoelectrochemical behavior in the early stage of a Ru(II)-dye-sensitized TiO2 solar cell with the addition of carboxylic acid in I-/I-3(-) acetonitrile solution is described. In the presence of carboxylic acid, photocurrent-voltage curves exhibit dramatic enhancement in stability, increase in photocurrent, and decrease in photovoltage compared with those in the absence of carboxylic acid. The changes were studied by measurements of flatband potential, UV-visible absorption and reflectance spectra, and ac impedance spectra. The measurements revealed that adsorption of carboxylic acid on the TiO2 surface plays a major role in variations of the photocurrent-voltage characteristics. (C) 2000 The Electrochemical Society. All rights reserved.

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页码：3049 / 3053

页数：5

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