The effect of substrate temperature on the physical properties of copper oxide films

Abstract

The effect of the substrate temperature of the deposition of copper oxide prepared by chemical spray pyrolysis technique was studied. The XRD measurements show that all the films are polycrystalline structure with predominant phase(-111). The crystallite size increase with increasing substrate temperature. The AFM images in 1-D and the 2-D shows that the CuO nanostructure were in the shape of curly sticks growing in a vertical column at an average height of 2.00 nm and an average radius of 40-50 nm. These nanostructures of the 3% sample gets higher up to 9.00 nm. The value of the optical energy gap was calculated through the UV-Vis spectrometer and found to decrease with increasing the substrate temperature from 1.93 eV to 1.68 eV. Transmittance values also decreased from 79.5% to 36%.