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CdS thin films fabricated by a simplified spray technique from different substrate temperatures-Structural, morphological, optical and electrical analysis

Author Affiliations

  • 1Department of Physics, AVVM Sri Pushpam College, Poondi–613503, Thanjavur Dt, Tamilnadu, INDIA

Res. J. Material Sci., Volume 2, Issue (2), Pages 6-15, April,16 (2014)

Abstract

A comprehensive study of the effect of substrate temperature on the physical properties of CdS thin films fabricated by a simplified spray technique using perfume atomizer is reported. The films were deposited on glass substrates using cadmium chloride precursor as Cd source and thiourea as S source respectively at different substrate temperatures. X-ray diffraction, scanning electron microscopy, UV-Vis-NIR spectroscopy and Energy dispersive X-ray analysis were used to characterize the films. XRD studies confirm the polycrystalline nature of the deposited films with hexagonal structure. The structural parameters such as lattice constants, crystallite size, dislocation density and number of crystallites per unit area have been evaluated. The composition of the various constituents in CdS thin films has been determined by energy dispersive X-ray analysis (EDAX). Films coated at 425ºC were found to be highly stoichiometric. Electrical resistivity decreases with increase in substrate temperature and a minimum electrical resistivity of 0.1057 x 10 ohm-m was obtained for the film coated at 425ºC. The high transmittance and low resistivity values obtained for all the films makes them suitable as efficient window layer for solar cell applications.

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