Structural, Optical and Electrical Properties of V2O5 Thin films by Spray Pyrolysis Method

Abstract

Vanadium pentoxide (V2O5) and indium tin oxide (ITO) coated V2O5 thin films were prepared by hydrothermal technique. The influence of different molarity of V2O5 on the electrical properties of ITO-V2O5 films was investigated. The films were found to be polycrystalline and to belong to a V2O5 orthorhombic crystal system based on their X-ray diffraction (XRD) analysis. It was confirmed by Fourier transform infrared (FT IR) spectrum that V2O5 functional groups formed a V-O bond. The optical band gaps were found to increases with increasing molarity in the range 2.18 – 2.89 eV. Scanning electron microscopy (SEM) analysis shows crumbled paper-like morphology in the sheet-like layer arrangement. The dielectric current (DC) electrical conductivity was studied as function of molarity which indicated the semiconducting nature. The morphological and structural studies show enhanced results for 4% sample which makes it a viable candidature for optical and electrical applications.