study the structural and optical properties of pure and lithium doped CdS thin films by chemical bath deposition method

Hussein Ali Noor, Dakhil Abbas AbdZaid

Abstract


This research deals with the Preparation of pure and   lithium doped CdS Thin Films by chemical bath deposition method , thickness (450±20)nm and the Preparation temperature (75C) . The results of XRD showed that the films had a polycrystalline hexagonal structure . The preferred orientation was along (002) plane. The average crystallite size Increasing with increasing The doping  . The results of the ( AFM ) showed that the roughness and (RMS)  value were increased with doping . Results (SEM) showed that the films  were uniformly distributed and homogenous . The optical properties were studied by recording the Absorption and Transmittance spectra of the wavelength range from (300-1100)nm, It was found that Absorption increased and  Transmittance decreased with increasing  doping  . It was also found that the Absorption Coefficient increased with increasing  doping  , Optical Energy Gap found  decreased with increasing doping from (2.72 – 2.89 )eV.


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