Preparation and investigation of the structural and optical characteristics of manganese- doped cadmium oxide films

Abstract

In this paper, undoped and Mn-doped CdO thin films deposited on the glass substrates by the chemical spray pyrolysis method (CSP) technique. The prepared thin films characterized by XRD, AFM, FESEM and UV visible. The results of the X-ray diffraction patterns revealed that the prepared films have a polycrystalline structure and a cubic structure. The crystallite size (D) value for all prepared films was calculated using Scherrer's method, Williamson-Hall method and size strain plot (SSP) method, from the results, it was observed that, the crystallite size decreases with increase in doping ratio of Manganese. The optical propertis show that with an increase in Mn concentration, the CdO films' transparency and the energy gap of the films increases. The Hall effect measurement revealed that all prepared films have negatives type (n-type) charge carriers, the value of the doping ratio rises, the Hall coefficient decreases.