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Role of domain walls in the abnormal photovoltaic effect in BiFeO3
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Bhatnagar, Akash, Roy Chaudhuri, Ayan, Heon Kim, Young, Hesse, Dietrich and Alexe, M. (Marin) (2013) Role of domain walls in the abnormal photovoltaic effect in BiFeO3. Nature Communications, Volume 4 . Article number 2835. doi:10.1038/ncomms3835 ISSN 2041-1723.
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Official URL: http://dx.doi.org/10.1038/ncomms3835
Abstract
Recently, the anomalous photovoltaic (PV) effect in BiFeO3 (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 50V 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.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Photovoltaic effect, Bismuth compounds, Domain structure, Ferroelectric thin films | ||||
Journal or Publication Title: | Nature Communications | ||||
Publisher: | Nature Publishing Group | ||||
ISSN: | 2041-1723 | ||||
Official Date: | 2013 | ||||
Dates: |
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Volume: | Volume 4 | ||||
Page Range: | Article number 2835 | ||||
DOI: | 10.1038/ncomms3835 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 26 December 2015 | ||||
Date of first compliant Open Access: | 26 December 2015 | ||||
Funder: | Deutsche Forschungsgemeinschaft (DFG), International Max Planck Research School (IMPRS), Alexander von Humboldt-Stiftung (AvHS) |
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