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  4. Reactive Sputtering of Bismuth Vanadate Photoanodes for Solar Water Splitting
 
research article

Reactive Sputtering of Bismuth Vanadate Photoanodes for Solar Water Splitting

Chen, Le
•
Alarcon-Lado, Esther
•
Hettick, Mark
Show more
2013
Journal Of Physical Chemistry C

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.

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Type
research article
DOI
10.1021/jp406019r
Web of Science ID

WOS:000326260000002

Author(s)
Chen, Le
Alarcon-Lado, Esther
Hettick, Mark
Sharp, Ian D.
Lin, Yongjing
Javey, Ali
Ager, Joel W.
Date Issued

2013

Publisher

Amer Chemical Soc

Published in
Journal Of Physical Chemistry C
Volume

117

Issue

42

Start page

21635

End page

21642

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IMX  
Available on Infoscience
December 9, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/97697
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