Effect of Mo doping on the electrical properties of VO2 phase

Abstract

Solution combustion synthesis technique was adopted to synthesize V2O5, and Mo doped phases, The assynthesized V2O5, has been reduced by a novel reduction technique to form VO2 typephase. The monophasic nature of the samples as revealed by XRD data and systematic shift in peak position indicated solid solubility up to 2 at % of Mo in VO2 lattice. The crystallite size was found to ~ 40 nm. Particle size measurement carried out using Transmission electron microscope (TEM)agreed with XRD experiments. Scanning electron microscope revealed the morphology of the particles to be plate like and bimodal. Variation in the metal-insulator transition temperature as a function of doping was investigated by 4-probe electrical resistivity measurement on sintered ceramics.