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Strain-gradient mediated local conduction in strained bismuth ferrite films
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Yang, Ming-Min, Iqbal, Affan, Peters, Jonathan J. P., Sánchez, Ana M. and Alexe, Marin (2019) Strain-gradient mediated local conduction in strained bismuth ferrite films. Nature Communications, 10 (1). 2791. doi:10.1038/s41467-019-10664-5
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Official URL: https://doi.org/10.1038/s41467-019-10664-5
Abstract
It has been recently shown that the strain gradient is able to separate the light-excited electron-hole pairs in semiconductors, but how it affects the photoelectric properties of the photo-active materials remains an open question. Here, we demonstrate the critical role of the strain gradient in mediating local photoelectric properties in the strained BiFeO3 thin films by systematically characterizing the local conduction with nanometre lateral resolution in both dark and illuminated conditions. Due to the giant strain gradient manifested at the morphotropic phase boundaries, the associated flexo-photovoltaic effect induces on one side an enhanced photoconduction in the R-phase, and on the other side a negative photoconductivity in the morphotropic [Formula: see text]-phase. This work offers insight and implication of the strain gradient on the electronic properties in both optoelectronic and photovoltaic devices.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Physics | ||||||||||||
| SWORD Depositor: | Library Publications Router | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Semiconductors, Photoelectric cells, Photovoltaic effect | ||||||||||||
| Journal or Publication Title: | Nature Communications | ||||||||||||
| Publisher: | Nature Publishing Group | ||||||||||||
| ISSN: | 2041-1723 | ||||||||||||
| Official Date: | 26 June 2019 | ||||||||||||
| Dates: |
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| Date of first compliant deposit: | 16 March 2020 | ||||||||||||
| Volume: | 10 | ||||||||||||
| Number: | 1 | ||||||||||||
| Article Number: | 2791 | ||||||||||||
| DOI: | 10.1038/s41467-019-10664-5 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||
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