Ameer, Shaan and Jindal, Kajal and Tomar, Monika and Kumar, Ashok and Jha, Pradip K. and Gupta, Vinay (2018) A theoretical and experimental formalism of electronic structure of BFO:Cr thin films and modulation of their electrical properties upon visible light illumination. Journal of Applied Physics , 124 (15). pp. 155304-155314. ISSN 0021-8979

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BiFeO3 (BFO) and BiFe1-xCrxO3 (BFCO) (x = 0, 0.01, 0.02, 0.03) thin films have been fabricated using chemical solution deposition technique. The bandgap of BFO and BFCO thin films is found to be lying in the visible region making these films suitable candidates for potential solar energy harvesting applications. Density functional theory based calculations have also been performed to study the effect of B-site (Cr) doping on the electronic properties of BFO and BFCO. The BiFe1-xCrxO3 (x = 0.02) thin films exhibited well saturated PE hysteresis loops with a maximum remanent and saturation polarization of about 43 mu C/cm(2) and 64 mu C/cm(2), respectively. In contrast to pure BFO, a high value of short circuit current density (J(sc)) of magnitude 766.60 mu A/cm(2) along with the open circuit voltage (V-oc) of 106 mV was obtained for BiFe0.98Cr0.02O3 thin film structure under illumination with a laser of wavelength 470 nm and intensity 20 mW/cm(2). The Au/BiFe0.98Cr0.02O3/ITO/glass heterostructure displays a remarkably enhanced value of I-on/I-off ratio (8.4 x 10(4)). The observed results clearly highlight the potential of Cr doped BFO thin film structure for the development of cost effective light-driven devices.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Institute of Physics.
Subjects: Applied Physics/Condensed Matter
Depositing User: Mr. Yogesh Joshi
Date Deposited: 29 Nov 2019 11:08
Last Modified: 29 Nov 2019 11:08

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