Reactive Sputtering of Bismuth Vanadate Photoanodes for Solar Water Splitting

被引：160
作者：
Chen, Le [1 ,2 ]
Alarcon-Llado, Esther [1 ,2 ,4 ]
Hettick, Mark [1 ,2 ,5 ]
Sharp, Ian D. [1 ,3 ]
Lin, Yongjing [1 ,2 ,5 ]
Javey, Ali [1 ,2 ,5 ]
Ager, Joel W. [1 ,2 ]
机构：
[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Joint Ctr Artificial Photosynth, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA
[4] Ecole Polytech Fed Lausanne, Lausanne, Switzerland
[5] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 42期
关键词：
VISIBLE-LIGHT; BIVO4; EFFICIENT; COMPOSITE; PHOTOELECTRODE; TEMPERATURE; IRRADIATION; MECHANISM; EVOLUTION; OXIDATION;
D O I：
10.1021/jp406019r
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Bismuth vanadate (BiVO4) has attracted increasing attention as a photoanode for photoelectrochemical (PEC) water splitting. It has a band gap in the visible light range (2.4-2.5 eV) and a valence band position suitable for driving water oxidation under illumination. While a number of methods have been used to make BiVO4 photoanodes, scalable thin film deposition has remained relatively underexplored. Here, we report the synthesis of BiVO4 thin films by reactive sputtering. The use of separate Bi and V sputtering targets allows control of the Bi/V ratio in the film. Under optimized, slightly V-rich conditions, monoclinic phase BiVO4 with photoactivity for water oxidation is obtained. The highest photocurrents, ca. 1 mA cm(-2) at the reversible O-2/H2O potential with simulated AM 1.5G illumination, are obtained with bilayer WO3/BiVO4, where the WO3 serves as a hole-blocking layer.
引用
收藏
页码：21635 / 21642
页数：8
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