Influence of annealing on properties of cadmium oxide thin films prepared by spray pyrolysis

Abstract EN

CdO thin films have been deposited by Spray Pyrolysis Technique (SPT) on a glass substrate.

The structural and optical properties of thin films are studied at different annealing temperatures 100, 200 and 300 Co.

By using X-Ray Diffraction, XRD patterns indicated that films are polycrystalline in nature and cubic phase with preferred orientation along the plane (111).

The optical properties using UV-VIS spectroscopy show that the direct band gaps decreased from (3 to 2.75) eV with increasing the annealing temperature from(100-300)Co, this decreasing could be ascribed to increase of the localized states available in band gap which referred by Urbach,s energy value.