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Ultrahigh Bulk Photovoltaic Effect Responsivity in Thin Films: Unexpected Behavior in a Classic Ferroelectric Material
Journal article   Open access   Peer reviewed

Ultrahigh Bulk Photovoltaic Effect Responsivity in Thin Films: Unexpected Behavior in a Classic Ferroelectric Material

Or Shafir, Andrew L. Bennett-Jackson, A. R. Will-Cole, Atanu Samanta, Dongfang Chen, Adrian Podpirka, Aaron Burger, Liyan Wu, Eduardo Lupi Sosa, Lane W. Martin, …
Solar RRL
21 Sep 2023
url
https://doi.org/10.1002/solr.202300294View
Published, Version of Record (VoR)CC BY V4.0 Open

Abstract

The bulk photovoltaic effect (BPE) has drawn considerable attention due to its ability to generate photovoltages above the band gap () and reports of highly enhanced photovoltaic current when using nanoscale absorbers or nanoscale electrodes, which however do not lend themselves to practical, scalable implementation. Here, we show that a strikingly high BPE photoresponse can be achieved in an ordinary thin‐film configuration merely by tuning fundamental ferroelectric properties. Non‐monotonic dependence of the responsivity ( R S C ) on the ferroelectric polarization ( P ) is observed and at the optimal value of the film polarization, a more than three orders of magnitude increase in the R S C from the bulk BaTiO 3 value is obtained, reaching R S C close to 10 −2 A/W, the highest value reported to date for the archetypical ferroelectric BaTiO 3 films. Our results challenge the applicability of standard first‐principles‐based descriptions of BPE to thin films and the inherent weakness of BPE in ferroelectric thin films. This article is protected by copyright. All rights reserved.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Energy & Fuels
Materials Science, Multidisciplinary
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