Photovoltaic effect in multi-domain ferroelectric perovskite oxides
- Creators
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Teh, Ying Shi
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Bhattacharya, Kaushik
Abstract
We propose a device model that elucidates the role of domain walls in the photovoltaic effect in multi-domain ferroelectric perovskites. The model accounts for the intricate interplay between ferroelectric polarization, space charges, photo-generation, and electronic transport. When applied to bismuth ferrite, results show a significant electric potential step across both 71° and 109° domain walls, which in turn contributes to the photovoltaic (PV) effect. We also find a strong correlation between polarization and oxygen octahedra tilts, which indicates the nontrivial role of the latter in the PV effect. The domain wall-based PV effect is further shown to be additive in nature, allowing for the possibility of generating the above-bandgap voltage.
Additional Information
© 2019 Published under license by AIP Publishing. Submitted: 29 November 2018; Accepted: 24 January 2019; Published Online: 13 February 2019. Ying Shi Teh gratefully acknowledges the support of the Resnick Institute at Caltech through the Resnick Graduate Research Fellowship.Attached Files
Published - 1.5083632.pdf
Submitted - 1811.07948.pdf
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Additional details
- Eprint ID
- 92455
- Resolver ID
- CaltechAUTHORS:20190124-122550312
- Resnick Sustainability Institute
- Created
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2019-01-25Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Resnick Sustainability Institute