Influence of Cr on photoelectrochemical properties of TiO2 thin films

被引：85

作者：

Radecka, M ^{[1
]}

Wierzbicka, M ^{[1
]}

Komornicki, S ^{[1
]}

Rekas, M ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Dept Mat Sci & Ceram, PL-30059 Krakow, Poland

来源：

PHYSICA B-CONDENSED MATTER | 2004年 / 348卷 / 1-4期

关键词：

titanium dioxide; photoanode; solar energy conversion; photoelectrochemistry; thin films;

D O I：

10.1016/j.physb.2003.11.086

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Both undoped and Cr-doped TiO2 thin films were investigated. The dependencies of the flat band potential on pH, Cr concentration as well as thermal reduction were determined. On the basis of the photocurrent experiments, the effect of Cr concentration and high-temperature reduction on solar energy conversion efficiency was discussed. It was found that addition of Cr leads to an increase of the recombination process of photoelectronic carriers and shifts the flat band potential towards negative values. Linear changes of the flat band potential with pH of the electrolyte has been observed for both undoped and Cr-doped films. The maximum energy conversion efficiency (above 2%) has been observed for a voltage bias of ca. 0.1-0.4 V. The highest energy conversion efficiency has been observed for undoped-TiO2 thin films. It reaches values of 1.9% and 2.2% for as sputtered and reduced samples, respectively. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：160 / 168

页数：9

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