Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.4817907
Title: Epitaxial ferroelectric BiFeO3 thin films for unassisted photocatalytic water splitting
Authors: Ji, W. 
Yao, K.
Lim, Y.-F.
Liang, Y.C. 
Suwardi, A.
Issue Date: 5-Aug-2013
Citation: Ji, W., Yao, K., Lim, Y.-F., Liang, Y.C., Suwardi, A. (2013-08-05). Epitaxial ferroelectric BiFeO3 thin films for unassisted photocatalytic water splitting. Applied Physics Letters 103 (6) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4817907
Abstract: Considering energy band alignment and polarization effect, ferroelectric BiFeO3 thin films are proposed as the photoanode in a monolithic cell to achieve unassisted photocatalytic water splitting. Significant anodic photocurrent was observed in our epitaxial ferroelectric BiFeO3 films prepared from sputter deposition. Both negative polarization charges and thinner films were found to promote the anodic photocatalytic reaction. Ultraviolet photoelectron spectroscopy proved that the conduction and valence band edges of BiFeO3 straddle the water redox levels. Theoretical analyses show that the large switchable polarization can modify the surface properties to promote the hydrogen and oxygen evolutions on the surfaces with positive and negative polarization charges, respectively. © 2013 AIP Publishing LLC.
Source Title: Applied Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/82296
ISSN: 00036951
DOI: 10.1063/1.4817907
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