Issue 15, 2015

Improved charge separation via Fe-doping of copper tungstate photoanodes

Abstract

Photoelectrochemical (PEC) water splitting offers a clean pathway to renewable and sustainable energy in the near future. The key to improving the efficiency of PEC devices is the ability to find materials with suitable optoelectronic properties, and identifying, then overcoming their limitations. In this paper, we explore the photoelectrochemical performance of CuWO4 photoanodes for solar water splitting, and find that charge separation is the dominant limitation for this material. As a result, we attempt to dope the material with Fe, the first such example of doping this semiconductor for PEC water splitting. An improvement in performance is achieved for doped films which show 1.5 times the photocurrent density and a 50% higher charge separation efficiency at 1.23 V vs. RHE.

Graphical abstract: Improved charge separation via Fe-doping of copper tungstate photoanodes

Supplementary files

Article information

Article type
Paper
Submitted
30 Nov 2014
Accepted
07 Mar 2015
First published
10 Mar 2015

Phys. Chem. Chem. Phys., 2015,17, 9857-9866

Author version available

Improved charge separation via Fe-doping of copper tungstate photoanodes

D. Bohra and W. A. Smith, Phys. Chem. Chem. Phys., 2015, 17, 9857 DOI: 10.1039/C4CP05565A

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