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Role of domain walls in the abnormal photovoltaic effect in BiFeO(3)
Recently, the anomalous photovoltaic (PV) effect in BiFeO(3) (BFO) thin films, which resulted in open circuit voltages (V(oc)) considerably larger than the band gap of the material, has generated a revival of the entire field of photoferroelectrics. Here, via temperature-dependent PV studies, we pro...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3868332/ http://dx.doi.org/10.1038/ncomms3835 |
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author | Bhatnagar, Akash Roy Chaudhuri, Ayan Heon Kim, Young Hesse, Dietrich Alexe, Marin |
author_facet | Bhatnagar, Akash Roy Chaudhuri, Ayan Heon Kim, Young Hesse, Dietrich Alexe, Marin |
author_sort | Bhatnagar, Akash |
collection | PubMed |
description | Recently, the anomalous photovoltaic (PV) effect in BiFeO(3) (BFO) thin films, which resulted in open circuit voltages (V(oc)) considerably larger than the band gap of the material, has generated a revival of the entire field of photoferroelectrics. Here, via temperature-dependent PV studies, we prove that the bulk photovoltaic (BPV) effect, which has been studied in the past for many non-centrosymmetric materials, is at the origin of the anomalous PV effect in BFO films. Moreover, we show that irrespective of the measurement geometry, V(oc) as high as 50 V can be achieved by controlling the conductivity of domain walls (DW). We also show that photoconductivity of the DW is markedly higher than in the bulk of BFO. |
format | Online Article Text |
id | pubmed-3868332 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-38683322013-12-20 Role of domain walls in the abnormal photovoltaic effect in BiFeO(3) Bhatnagar, Akash Roy Chaudhuri, Ayan Heon Kim, Young Hesse, Dietrich Alexe, Marin Nat Commun Article Recently, the anomalous photovoltaic (PV) effect in BiFeO(3) (BFO) thin films, which resulted in open circuit voltages (V(oc)) considerably larger than the band gap of the material, has generated a revival of the entire field of photoferroelectrics. Here, via temperature-dependent PV studies, we prove that the bulk photovoltaic (BPV) effect, which has been studied in the past for many non-centrosymmetric materials, is at the origin of the anomalous PV effect in BFO films. Moreover, we show that irrespective of the measurement geometry, V(oc) as high as 50 V can be achieved by controlling the conductivity of domain walls (DW). We also show that photoconductivity of the DW is markedly higher than in the bulk of BFO. Nature Pub. Group 2013-11-27 /pmc/articles/PMC3868332/ http://dx.doi.org/10.1038/ncomms3835 Text en Copyright © 2013, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Bhatnagar, Akash Roy Chaudhuri, Ayan Heon Kim, Young Hesse, Dietrich Alexe, Marin Role of domain walls in the abnormal photovoltaic effect in BiFeO(3) |
title | Role of domain walls in the abnormal photovoltaic effect in BiFeO(3) |
title_full | Role of domain walls in the abnormal photovoltaic effect in BiFeO(3) |
title_fullStr | Role of domain walls in the abnormal photovoltaic effect in BiFeO(3) |
title_full_unstemmed | Role of domain walls in the abnormal photovoltaic effect in BiFeO(3) |
title_short | Role of domain walls in the abnormal photovoltaic effect in BiFeO(3) |
title_sort | role of domain walls in the abnormal photovoltaic effect in bifeo(3) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3868332/ http://dx.doi.org/10.1038/ncomms3835 |
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