Abstract
Brownmillerite structured Multiferroic KBiFe2O5 (KBFO) is a promising photoactive material for subsequent optoelectronic applications due to its smaller bandgap and intrinsic polarization. Herein, we reported the preparation, optical, and electrical properties of the KBFO thin film. The phase confirmation and structural properties of KBFO thin film prepared by a simple spin coating technique were characterized by X-ray diffraction (XRD) pattern and Raman Spectroscopy. The surface morphology as well as the thickness of the KBFO thin film deposited on FTO-coated glass, was identified by field effect scanning electron microscopy (FESEM). The bandgap of KBFO film was investigated by UV–Vis Spectroscopy and Photoluminescence Spectroscopy which extends the visible region compared to other conventional multiferroics. The evidence of photovoltaic response in KBFO device was explained based on Current-Voltage characteristics under dark as well as light illumination. In summary, the intrinsic polarization and photo absorption properties in KBFO could be regarded the material as a suitable candidate for ferroelectric photovoltaic applications.
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