Bulk photovoltaic effect in hexagonal LuMnO3 single crystals
Abstract
Hexagonal manganites, such as h-LuMnO3, are ferroelectric and have a narrow electronic band gap of ≈1.5eV. Here we report on the photoresponse of h-LuMnO3 single crystals. It is found that the short circuit photocurrent density (Jsc) and the open circuit voltage (Voc) are dependent on the direction of the polarization plane of a linearly polarized impinging light. Its angular dependence indicates the contribution of bulk photovoltaic effect to the short circuit photocurrent (JBPE). It is also observed that a switchable drift photocurrent, originating from the depoling field of the ferroelectric and thus tunable(<10%) by its polarization direction, also contributes to Jsc. Although its presence precludes accurate determination of the bulk photovoltaic tensor elements and Glass coefficients, some bounds can be established. The Glass coefficients are found to be significantly larger than those obtained in BiFeO3. We argue that the smaller band gap of h-LuMnO3, its distinctive bipyramidal crystal field, and electronic configuration (3d4vs 3d5), account for the difference and suggest a path towards ferroelectrics of higher photoconversion efficiency.
- Authors:
-
[1];
[1];
[3];
[3];
[1]
- Inst. de Ciencia de Materials de Barcelona (ICMAB-CSIC), Catalonia (Spain)
- Bulgarian Academy of Sciences, Sofia (Bulgaria)
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Publication Date:
- Research Org.:
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Spanish Ministry of Science, Innovation and Universities; Generalitat de Catalunya; BBVA Foundation; China Scholarship Council
- OSTI Identifier:
- 1869293
- Grant/Contract Number:
- FG02-07ER46431; CEX2019-000917-S; MAT2017-85232-R; PID2019-107727RB-I00; 2017-SGR-1377; RYC-2017-22531; 201806410010
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 104; Journal Issue: 18; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 14 SOLAR ENERGY; ferroelectric; bulk photovoltaic; photovoltaic
Citation Formats
Sheng, Yunwei, Fina, Ignasi, Gospodinov, Marin, Schankler, Aaron M., Rappe, Andrew M., and Fontcuberta, Josep. Bulk photovoltaic effect in hexagonal LuMnO3 single crystals. United States: N. p., 2021.
Web. doi:10.1103/physrevb.104.184116.
Sheng, Yunwei, Fina, Ignasi, Gospodinov, Marin, Schankler, Aaron M., Rappe, Andrew M., & Fontcuberta, Josep. Bulk photovoltaic effect in hexagonal LuMnO3 single crystals. United States. https://doi.org/10.1103/physrevb.104.184116
Sheng, Yunwei, Fina, Ignasi, Gospodinov, Marin, Schankler, Aaron M., Rappe, Andrew M., and Fontcuberta, Josep. Mon .
"Bulk photovoltaic effect in hexagonal LuMnO3 single crystals". United States. https://doi.org/10.1103/physrevb.104.184116. https://www.osti.gov/servlets/purl/1869293.
@article{osti_1869293,
title = {Bulk photovoltaic effect in hexagonal LuMnO3 single crystals},
author = {Sheng, Yunwei and Fina, Ignasi and Gospodinov, Marin and Schankler, Aaron M. and Rappe, Andrew M. and Fontcuberta, Josep},
abstractNote = {Hexagonal manganites, such as h-LuMnO3, are ferroelectric and have a narrow electronic band gap of ≈1.5eV. Here we report on the photoresponse of h-LuMnO3 single crystals. It is found that the short circuit photocurrent density (Jsc) and the open circuit voltage (Voc) are dependent on the direction of the polarization plane of a linearly polarized impinging light. Its angular dependence indicates the contribution of bulk photovoltaic effect to the short circuit photocurrent (JBPE). It is also observed that a switchable drift photocurrent, originating from the depoling field of the ferroelectric and thus tunable(<10%) by its polarization direction, also contributes to Jsc. Although its presence precludes accurate determination of the bulk photovoltaic tensor elements and Glass coefficients, some bounds can be established. The Glass coefficients are found to be significantly larger than those obtained in BiFeO3. We argue that the smaller band gap of h-LuMnO3, its distinctive bipyramidal crystal field, and electronic configuration (3d4vs 3d5), account for the difference and suggest a path towards ferroelectrics of higher photoconversion efficiency.},
doi = {10.1103/physrevb.104.184116},
journal = {Physical Review. B},
number = 18,
volume = 104,
place = {United States},
year = {Mon Nov 29 00:00:00 EST 2021},
month = {Mon Nov 29 00:00:00 EST 2021}
}
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