Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films

Liang Fang; Lu You; Yang Zhou; Peng Ren; Zhi Shiuh Lim; Junling Wang

doi:10.1063/1.4870972

Switchable photovoltaic response from polarization modulated interfaces in BiFeO₃ thin films

Liang Fang
, Lu You
, Yang Zhou
, Peng Ren
, Zhi Shiuh Lim
, Junling Wang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

85 Citations (Scopus)

Abstract

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 La _0.7Sr_0.3MnO₃ and Pt as electrodes. Much larger switchable photovoltaic response can be observed in the Pt/BiFeO ₃/La_0.7Sr_0.3MnO₃ samples, as compared with La_0.7Sr_0.3MnO₃/BiFeO ₃/La_0.7Sr_0.3MnO₃. Moreover, the photovoltaic voltage of the Pt/BiFeO₃/La_0.7Sr _0.3MnO₃ samples is nearly independent of the thickness of the La_0.7Sr_0.3MnO₃ 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. © 2014 AIP Publishing LLC.

Original language	English
Article number	142903
Journal	Applied Physics Letters
Volume	104
Issue number	14
DOIs	https://doi.org/10.1063/1.4870972
Publication status	Published - 7 Apr 2014
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access Output

10.1063/1.4870972

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{9cfd4467ef284a3197381b8dda141f0e,

title = "Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films",

abstract = "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 La 0.7Sr0.3MnO3 and Pt as electrodes. Much larger switchable photovoltaic response can be observed in the Pt/BiFeO 3/La0.7Sr0.3MnO3 samples, as compared with La0.7Sr0.3MnO3/BiFeO 3/La0.7Sr0.3MnO3. Moreover, the photovoltaic voltage of the Pt/BiFeO3/La0.7Sr 0.3MnO3 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. {\textcopyright} 2014 AIP Publishing LLC.",

author = "Liang Fang and Lu You and Yang Zhou and Peng Ren and Lim, \{Zhi Shiuh\} and Junling Wang",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2014",

month = apr,

day = "7",

doi = "10.1063/1.4870972",

language = "English",

volume = "104",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "14",

}

TY - JOUR

T1 - Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films

AU - Fang, Liang

AU - You, Lu

AU - Zhou, Yang

AU - Ren, Peng

AU - Lim, Zhi Shiuh

AU - Wang, Junling

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2014/4/7

Y1 - 2014/4/7

N2 - 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 La 0.7Sr0.3MnO3 and Pt as electrodes. Much larger switchable photovoltaic response can be observed in the Pt/BiFeO 3/La0.7Sr0.3MnO3 samples, as compared with La0.7Sr0.3MnO3/BiFeO 3/La0.7Sr0.3MnO3. Moreover, the photovoltaic voltage of the Pt/BiFeO3/La0.7Sr 0.3MnO3 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. © 2014 AIP Publishing LLC.

AB - 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 La 0.7Sr0.3MnO3 and Pt as electrodes. Much larger switchable photovoltaic response can be observed in the Pt/BiFeO 3/La0.7Sr0.3MnO3 samples, as compared with La0.7Sr0.3MnO3/BiFeO 3/La0.7Sr0.3MnO3. Moreover, the photovoltaic voltage of the Pt/BiFeO3/La0.7Sr 0.3MnO3 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. © 2014 AIP Publishing LLC.

UR - https://www.scopus.com/pages/publications/84899010126

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84899010126&origin=recordpage

U2 - 10.1063/1.4870972

DO - 10.1063/1.4870972

M3 - RGC 21 - Publication in refereed journal

SN - 0003-6951

VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

M1 - 142903

ER -