Improved current collection in WO3:Mo/WO3 bilayer photoelectrodes

Title
Improved current collection in WO3:Mo/WO3 bilayer photoelectrodes
Author(s)
Nicolas Gaillard[Nicolas Gaillard]B. Cole[B. Cole]J. Kaneshiro[J. Kaneshiro]E. L. Miller[E. L. Miller]B. Marsen[B. Marsen]L. Weinhardt[L. Weinhardt]M. Bar[M. Bar]C. Heske[C. Heske]안광순Yanfa Yan[Yanfa Yan]M. M. Al-Jassim[M. M. Al-Jassim]
Keywords
TUNGSTEN TRIOXIDE FILMS; HYDROGEN-PRODUCTION; THIN-FILMS; WO3 FILMS; OXIDE; PROGRESS
Issue Date
201001
Publisher
CAMBRIDGE UNIV PRESS
Citation
JOURNAL OF MATERIALS RESEARCH, v.25, no.1, pp.45 - 51
Abstract
We report on the incorporation of molybdenum into tungsten oxide by co-sputtering and its effect on solar-powered photoelectrochemical (PEC) water splitting. Our study shows that Mo incorporation in the bulk of the film (WO3:Mo) results in poor PEC performance when compared with pure WO3, most likely due to defects that trap photo-generated charge carriers. However, when a WO3:Mo/WO3 bilayer electrode is used, a 20% increase of the photocurrent density at 1.6 V versus saturated calomel reference electrode is observed compared with pure WO3. Morphological and microstructurat analysis of the WO3:Mo/WO3 bilayer structure reveals that it is formed by coherent growth of the WO3:Mo top layer on the WO3 bottom layer. This effect allows an optimization of the electronic surface structure of the electrode while maintaining good crystallographic properties in the bulk.
URI
http://hdl.handle.net/YU.REPOSITORY/23009http://dx.doi.org/10.1557/JMR.2010.0019
ISSN
0884-2914
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공과대학 > 화학공학부 > Articles
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