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International Journal of Photoenergy
Volume 2014, Article ID 643532, 3 pages
http://dx.doi.org/10.1155/2014/643532
Research Article

Sensitization of Perovskite Strontium Stannate SrSnO3 towards Visible-Light Absorption by Doping

1Environmental Remediation Materials Unit, National Institute for Materials Sciences, Ibaraki Prefecture 305-0044, Japan
2PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama Prefecture 332-0012, Japan
3TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, China

Received 26 June 2014; Accepted 3 August 2014; Published 18 August 2014

Academic Editor: Wenjun Luo

Copyright © 2014 Hungru Chen and Naoto Umezawa. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Perovskite strontium stannate SrSnO3 is a promising photocatalyst. However, its band gap is too large for efficient solar energy conversion. In order to sensitize SrSnO3 toward visible-light activities, the effects of doping with various selected cations and anions are investigated by using hybrid density functional calculations. Results show that doping can result in dopant level to conduction band transitions which lie lower in energy compared to the original band gap transition. Therefore, it is expected that doping SrSnO3 can induce visible-light absorption.