Improved current collection in WO3:Mo/WO3 bilayer photoelectrodes

被引：24

作者：

Gaillard, Nicolas ^{[1
]}

Cole, Brian ^{[1
]}

Kaneshiro, Jess ^{[1
]}

Miller, Eric L. ^{[1
]}

Marsen, Bjorn ^{[2
]}

Weinhardt, Lothar ^{[3
,4
]}

Baer, Marcus ^{[2
,3
]}

Heske, Clemens ^{[3
]}

Ahn, Kwang-Soon ^{[5
]}

Yan, Yanfa ^{[5
]}

Al-Jassim, Mowafak M. ^{[5
]}

机构：

[1] Univ Hawaii Manoa, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA

[2] Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany

[3] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA

[4] Univ Wurzburg, D-97074 Wurzburg, Germany

[5] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

JOURNAL OF MATERIALS RESEARCH | 2010年 / 25卷 / 01期

关键词：

TUNGSTEN TRIOXIDE FILMS; HYDROGEN-PRODUCTION; THIN-FILMS; WO3; FILMS; OXIDE; PROGRESS;

D O I：

10.1557/JMR.2010.0019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：45 / 51

页数：7

共 21 条

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