This paper reports the influence of annealing temperature on optical and dispersion energy parameters of sol-gel routed spin – coated Molybdenum tri Oxide (MoO3) thin films. The higher annealing temperatures increase the values of dispersion energy parameters.XRD study reveals the formation of α- orthorhombic phase at higher annealing temperature and amorphous nature at lower annealing temperature. The optical band gap of MoO3 film is found to be 3.3 -3.8eV, and the refractive index of the film is found to be 2.2 -2.9. The dispersion curve of the refractive index shows an aberrant dispersion in the absorption region. Using the single oscillator of Wemple –Didomenico model the different dispersion energy parameters are evaluated.
Prof. Dr. Bilal BİLGİN