Polarization-independent enhancement in UV photoconductivity of BiFeO3/Sn:In2O3 heterostructure
Date
2023-05-08Author
Banda, Rajender Reddy
Halge, Devidas I.
Narwade, Vijaykiran N.
Kaawash, Nabeel M.S.
Thabit, Mohammed Y.H.
Alegaonkar, Prashant S.
Bogle, Kashinath A.
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Show full item recordAbstract
Currently, polarization-dependent transport in ferroelectric materials under optical illumination is gaining a lot of attention in optoelectronics. This idea is implemented on BiFeO3 to illustrate its UV�Visible light photodetection property, however, naturally occurring bismuth or oxygen vacancies serve a major disadvantage as they interfere with its polarization ability. It is very difficult to overcome this defect issue in bismuth-based perovskites, therefore, based on this herein an enhancement in the photoconductive property of polycrystalline BiFeO3 thin film deposited via spray pyrolysis technique on Sn:In2O3 coated glass substrate is demonstrated without polarizing it. An extraordinary photodetection behavior with higher photoresponsivity (1.01 A/W) and external quantum efficiency (364) as well as faster response speed (6 ms) even under low UV illumination (340 nm) and lower applied bias of 2 V is observed. The roles of the BiFeO3�Sn:In2O3 interface, as well as the adsorption/desorption of oxygen molecules on the surface of BiFeO3 layers, were highlighted for the ferroelectric material's UV photodetector application. � 2023 Elsevier B.V.
Journal
Physica B: Condensed Matter
Access Type
Closed Access