Effect of Molar Concentration on the Optical and Structural Properties of CdO:In Thin Films Deposited by Spray Pyrolysis

Abd, Jinan Ali; Ahmed, Rafia T.; Mohamed, Nada A.
June 2014
Australian Journal of Basic & Applied Sciences;2014 Special, Vol. 8 Issue 8, p166
Academic Journal
Cadmium oxide (CdO:2%In) thin films have been deposited onto glass substrates from different molar concentration of cadmium acetate precursor solution using a simple spray pyrolysis technique. The structural and optical properties of the films have been characterized by X-ray diffraction study and UV spectroscopy. The crystal structure of the deposited films were found to be polycrystalline of cubic structure with preferentially orientated along (111) crystallographic directions. Increase of molar concentration increases the films packing density and reorient the crystallites along (1 1 1) plane. There is an increase in the optical transmissions for all films with increasing in the wavelength and molar concentration. For different molar concentrations (0.1M, 0.2 M, and 0.3M), the direct band gap is found to be in the range (2.3, 2.35, and 2.45 eV). The band gap energies depend on molar concentration of solution.


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