Fabrication and characterization of BiFeO3 thin films and application for photovoltaic devices

Abstract

Bismuth ferrite (BiFeO₃) thin films were fabricated by a simple spin-coating method. Polycrystalline BiFeO₃ thin films were confirmed by X-ray diffraction. Lattice constants and crystallite sizes of the BiFeO₃ thin films increased with increasing concentration of BiFeO₃ precursor solution. BiFeO₃/CH₃NH₃PbI₃ photovoltaic devices were fabricated to characterize photovoltaic properties. Current density-voltage characteristics of the photovoltaic devices exhibited rectifying behaviors, indicating that BiFeO₃ layer acted an electron transport layer.