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Study of Structural and Optical Properties of CdS Thin Films Prepared by Chemical Bath Deposition Technique

Nabachandra Singh Asem, S. Bidyaswor Singh, Kh. Kamala Devi, L. Raghumani Singh

Abstract


Chemical bath deposition (CBD) technique was used to deposit nano-structured cadmium sulfide (CdS) thin films on pre-treated glass substrates. The films are studied using the X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical absorption and transmission techniques. The XRD shows that the films are polycrystalline and are a mixture of cubic and hexagonal phases, which agrees with the earlier report of CdS thin film. The average grain size of the film is about 39.14 nm. SEM studies indicate that the grains are
seen to be spherical and symmetrical, not uniformly distributed and not well connected to each other. The EDAX spectrum shows that the film contains the elements Cd and S as expected. Optical study shows that the film has a band gap of 3.15 eV.

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References


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