Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films

The switchable photovoltaic effect in BiFeO3 thin films capacitors has been studied extensively. However, the origin of the photovoltaic response is still under debate. Both bulk depolarization field and interface effects have been used to explain the observations. In this work, we fabricate BiFeO3...

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Main Authors:	Fang, Liang, You, Lu, Zhou, Yang, Ren, Peng, Lim, Zhi Shiuh, Wang, Junling
Other Authors:	School of Materials Science & Engineering
Format:	Article
Language:	English
Published:	2014
Subjects:	DRNTU::Engineering::Materials::Photonics and optoelectronics materials
Online Access:	https://hdl.handle.net/10356/104104 http://hdl.handle.net/10220/19550
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Institution:	Nanyang Technological University
Language:	English

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spelling	sg-ntu-dr.10356-1041042023-07-14T15:55:46Z Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films Fang, Liang You, Lu Zhou, Yang Ren, Peng Lim, Zhi Shiuh Wang, Junling School of Materials Science & Engineering DRNTU::Engineering::Materials::Photonics and optoelectronics materials The switchable photovoltaic effect in BiFeO3 thin films capacitors has been studied extensively. However, the origin of the photovoltaic response is still under debate. Both bulk depolarization field and interface effects have been used to explain the observations. In this work, we fabricate BiFeO3 epitaxial films on SrTiO3 substrate with La0.7Sr0.3MnO3 and Pt as electrodes. Much larger switchable photovoltaic response can be observed in the Pt/BiFeO3/La0.7Sr0.3MnO3 samples, as compared with La0.7Sr0.3MnO3/BiFeO3/La0.7Sr0.3MnO3. Moreover, the photovoltaic voltage of the Pt/BiFeO3/La0.7Sr0.3MnO3 samples is nearly independent of the thickness of the La0.7Sr0.3MnO3 bottom electrode. We suggest that the Schottky barrier modulation by ferroelectric polarization at the Pt/BiFeO3 interface is mainly responsible for the photovoltaic effect, with very small contribution from the bulk depolarization field. Published version 2014-06-04T03:37:50Z 2019-12-06T21:26:31Z 2014-06-04T03:37:50Z 2019-12-06T21:26:31Z 2014 2014 Journal Article Fang, L., You, L., Zhou, Y., Ren, P., Lim, Z. S., & Wang, J. (2014). Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films. Applied Physics Letters, 104(14), 142903-. 0003-6951 https://hdl.handle.net/10356/104104 http://hdl.handle.net/10220/19550 10.1063/1.4870972 en Applied physics letters © 2014 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: http://dx.doi.org/10.1063/1.4870972. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution	Nanyang Technological University
building	NTU Library
continent	Asia
country	Singapore Singapore
content_provider	NTU Library
collection	DR-NTU
language	English
topic	DRNTU::Engineering::Materials::Photonics and optoelectronics materials
spellingShingle	DRNTU::Engineering::Materials::Photonics and optoelectronics materials Fang, Liang You, Lu Zhou, Yang Ren, Peng Lim, Zhi Shiuh Wang, Junling Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films
description	The switchable photovoltaic effect in BiFeO3 thin films capacitors has been studied extensively. However, the origin of the photovoltaic response is still under debate. Both bulk depolarization field and interface effects have been used to explain the observations. In this work, we fabricate BiFeO3 epitaxial films on SrTiO3 substrate with La0.7Sr0.3MnO3 and Pt as electrodes. Much larger switchable photovoltaic response can be observed in the Pt/BiFeO3/La0.7Sr0.3MnO3 samples, as compared with La0.7Sr0.3MnO3/BiFeO3/La0.7Sr0.3MnO3. Moreover, the photovoltaic voltage of the Pt/BiFeO3/La0.7Sr0.3MnO3 samples is nearly independent of the thickness of the La0.7Sr0.3MnO3 bottom electrode. We suggest that the Schottky barrier modulation by ferroelectric polarization at the Pt/BiFeO3 interface is mainly responsible for the photovoltaic effect, with very small contribution from the bulk depolarization field.
author2	School of Materials Science & Engineering
author_facet	School of Materials Science & Engineering Fang, Liang You, Lu Zhou, Yang Ren, Peng Lim, Zhi Shiuh Wang, Junling
format	Article
author	Fang, Liang You, Lu Zhou, Yang Ren, Peng Lim, Zhi Shiuh Wang, Junling
author_sort	Fang, Liang
title	Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films
title_short	Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films
title_full	Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films
title_fullStr	Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films
title_full_unstemmed	Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films
title_sort	switchable photovoltaic response from polarization modulated interfaces in bifeo3 thin films
publishDate	2014
url	https://hdl.handle.net/10356/104104 http://hdl.handle.net/10220/19550
_version_	1772828468567867392

Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films

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