Thin Films Growth of SnO_2:F/CdS/CdTe, and Studies of Their Physical and Optical Properties using Spray Pyrolysis Techniques

Abstract

Fluorine doped tin oxide, Cadmium Sulphide \xa0and Cadmium Telluride \xa0thin films have been deposted on Soda Lime glass substrate at \xa0respectively by spray pyrolysis (SP) technique and are important semiconductor materials in optoelectronic devices such as optical sensors, light-emitting diodes, transistors and photovoltaic cells. \xa0thin films were characterized by various techniques such as X-ray diffraction, SEM and optical studies. X-ray diffraction measurements show that the deposited\xa0 \xa0was found to be of cassiterite type with tetragonal rutile structure, observation of peaks of different planes on an X-ray diffraction graph of \xa0thin film showed that \xa0film obtained were cubic structure. The main peak value of \xa0thin film is seen at , which is the characteristic peak of the \xa0compound \xa0and the \xa0film structure was obtained at the major peak \xa0indicating the preferred orientation of \xa0films along \xa0direction. This confirms the formation of \xa0thin film, with (111) as the strongest preferred plane of orientation. The surface morphology of the thin films was analysed by scanning electron microscopy (SEM). The optical energy band gap of thin films are determine \xa0The results showed that the prepared FTO, CdS and CdTe films can be used in solar energy applications.