Optically controlled polarization, photovoltaic and switchable diode behavior in multifunctional KBiFe2O5 composite film

Jalaja, MA and Dutta, Soma (2019) Optically controlled polarization, photovoltaic and switchable diode behavior in multifunctional KBiFe2O5 composite film. Ceramics International, 45 (17). pp. 22553-22557. ISSN 02728842

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Official URL: https://www.sciencedirect.com/science/article/pii/...

Abstract

This paper presents a light-induced diode effect in connection with the polarization direction and enhanced remanent polarization in polymer composite of the well-known multiferroic KBiFe2O5 film. Composite films of KBiFe2O5 with different PVA ratios were prepared by spin coating of ceramic slurry and the best composition with PVA was selected on the basis of its suitability for visible light absorption. KBiFe2O5-PVA composite film showed enhanced photovoltaic response under visible-light exposure with open circuit voltage of 2.11 V, photocurrent density of −8.3 × 10−5 A/cm2 and efficiency of 0.076%. The observed diode-like behavior in the composite film switched its direction with the flipping of electric polarization by an external voltage. The enhanced ferroelectric properties in the film were due to the reduction in leakage owing to the presence of non-conductive polymer in it. The composite film exhibited a piezoelectric coefficient of 1.98 nm/V and 2.2 nm/V corresponding to 15 V and −15 V respectively.

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
CHEMISTRY AND MATERIALS > Composite Materials
CHEMISTRY AND MATERIALS > Inorganic, Organic and Physical Chemistry
Depositing User: Mrs SK Pratibha
Date Deposited: 23 Nov 2021 11:41
Last Modified: 23 Nov 2021 11:41
URI: http://nal-ir.nal.res.in/id/eprint/13341

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