Application of weak ferromagnetic BiFeO3 films as the photoelectrode material under visible-light irradiation

被引：58
|
作者：
Chen, X. Y.
Yu, T. [1 ]
Gao, F.
Zhang, H. T.
Liu, L. F.
Wang, Y. M.
Li, Z. S.
Zou, Z. G.
Liu, J.-M.
机构：
[1] Nanjing Univ, Ecomat & Renewable Energy Res Ctr, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 02期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2757132
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
BiFeO3 films prepared by pulsed laser deposition on Pt/TiO2/SiO2/Si substrates were studied as photoelectrode for water splitting. Under visible-light irradiation, the photocurrent intensity of the polycrystalline BiFeO3 film was found to double that of the amorphous one in a three-electrode cell. The incident photon to current conversion efficiency for the polycrystalline BiFeO3 electrode was approximately 16% at 350 nm and 7% at 530 nm at 1.5 V (versus saturated calomel electrode). The ferromagnetism of the amorphous BiFeO3 film was an order of magnitude weaker than that of the polycrystalline one, supporting the "size effect" explanation for magnetic origin. (C) 2007 American Institute of Physics.
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页数：3
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