Effect of Thickness on Optical Properties of (Cr2O3) Thin Films Prepared By Chemical Spray Pyrolysis Technique

Abstract

Chrome oxide (Cr2O3) thin films at different thickness(1350-1600ºA) were prepared by chemical spray pyrolysis technique at ( 400º C) on glass substrate .Absorbance and transmittancespectra have been recorded as a function of wave length in the range (190- 900nm).We found all optical properties such as (transmission,reflectance ,refractive index, extinction coefficient ,energy gap of allowed direct transition and dielectric constant in real and imagery parts all as a function of the wavelength decrease with increase thickness except the absorbance