Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevB.84.094115
Title: Evidence of bulk photovoltaic effect and large tensor coefficient in ferroelectric BiFeO3 thin films
Authors: Ji, W. 
Yao, K.
Liang, Y.C. 
Issue Date: 23-Sep-2011
Citation: Ji, W., Yao, K., Liang, Y.C. (2011-09-23). Evidence of bulk photovoltaic effect and large tensor coefficient in ferroelectric BiFeO3 thin films. Physical Review B - Condensed Matter and Materials Physics 84 (9) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.84.094115
Abstract: We present a study on the bulk photovoltaic effect (BPVE) in ferroelectric thin films, in which the photocurrent is measured with symmetric electrodes in the plane perpendicular to the ferroelectric polarization to eliminate the effect of the depolarization field and interfacial energy barriers. We show evidence of a strong BPVE in epitaxial BiFeO3 (BFO) films as thin as 40 nm. By taking into account the nonuniform absorption of incident photons, we obtain the bulk photovoltaic tensor coefficient β22 for BFO thin films. Remarkably, it is about five orders of magnitude larger than that of other typical ferroelectric materials for visible wavelengths. The results indicate that the BPVE in ferroelectric BFO thin films could be further explored for solar light photovoltaic applications. © 2011 American Physical Society.
Source Title: Physical Review B - Condensed Matter and Materials Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/82305
ISSN: 10980121
DOI: 10.1103/PhysRevB.84.094115
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