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Semak S, Kapustianyk V, Eliyashevskyy Y, Bovgyra O, Kovalenko M, Mostovoi U, Doudin B, Kundys B. On the photovoltaic effect asymmetry in ferroelectrics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 35:094001. [PMID: 36544427 DOI: 10.1088/1361-648x/aca579] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Despite symmetrical polarization, the magnitude of a light-induced voltage is known to be asymmetric with respect to poling sign in many photovoltaic (PV) ferroelectrics (FEs). This asymmetry remains unclear and is often attributed to extrinsic effects. We show here for the first time that such an asymmetry can be intrinsic, steaming from the superposition of asymmetries of internal FE bias and electro-piezo-strictive deformation. This hypothesis is confirmed by the observed decrease of PV asymmetry for smaller FE bias. Moreover, the both PV effect and remanent polarization are found to increase under vacuum-induced expansion and to decrease for gas-induced compression, with tens percents tunability. The change in cations positions under pressure is analysed through the first-principle density functional theory calculations. The reported properties provide key insight for FE-based solar elements optimization.
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Affiliation(s)
- S Semak
- Faculty of Physics, Ivan Franko National University of Lviv, Dragomanova 50, Lviv, UA79005, Ukraine
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, F-67000 Strasbourg, France
| | - V Kapustianyk
- Faculty of Physics, Ivan Franko National University of Lviv, Dragomanova 50, Lviv, UA79005, Ukraine
| | - Yu Eliyashevskyy
- Faculty of Physics, Ivan Franko National University of Lviv, Dragomanova 50, Lviv, UA79005, Ukraine
| | - O Bovgyra
- Faculty of Physics, Ivan Franko National University of Lviv, Dragomanova 50, Lviv, UA79005, Ukraine
| | - M Kovalenko
- Faculty of Physics, Ivan Franko National University of Lviv, Dragomanova 50, Lviv, UA79005, Ukraine
| | - U Mostovoi
- Faculty of Physics, Ivan Franko National University of Lviv, Dragomanova 50, Lviv, UA79005, Ukraine
| | - B Doudin
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, F-67000 Strasbourg, France
| | - B Kundys
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, F-67000 Strasbourg, France
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Li Q, Ying M, Zhang M, Cheng W, Li W, Liao B, Zhang X. Structural characterization and surface polarity determination of polar ZnO films prepared by MBE. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01978-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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