Effect of Thickness on the Optical Parameters of NiO Prepared by Spray Pyrolysis Technique

Abstract

NiO films with different thickness were deposited on to glass substrates using the spray pyrolysis technique, The thickness of the prepared films were 140,180,240,280 and 330 nm Transmission and absorption spectra were recorded in the wavelength range 300-900 nm in order to study the effect of increasing thickness on some optical constants such as reflectance, absorption coefficient , refractive index, extinction coefficient, real and imaginary parts of dielectric constant and optical conductivity. This study reveals that all these parameters affect by increasing the thickness.