TITLE:
Effect of Annealing Temperature on Structural, Optical and Electrical Properties of Pure CdS Thin Films Deposited by Spray Pyrolysis Technique
AUTHORS:
A. Hasnat, J. Podder
KEYWORDS:
Spray Pyrolysis; CdS; Annealing Temperature; Structural; Optical Band Gap
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.2 No.4,
December
31,
2012
ABSTRACT: Effect of annealing temperature on the properties of CdS
thin films are carried out in this work. Nanocrystalline cadmium
sulphide (CdS) thin films were prepared using spray pyrolysis deposition (SPD)
technique and the structural, optical and electrical properties were
investigated for different annealing temperature (as deposited, 300, 400 & 500 C). The surface morphology and
compositional properties studied by SEM and EDX respectively. The crystal
structure of CdS thin film was studied by X-ray diffraction. The crystallite
size and lattice constant of SPD CdS thin films were investigated. The
optical parameters such as transmittance, absorption coefficient and energy
band gap of the films with thermal annealing temperature was investigated by
UV/VIS spectrophotometer. The variation of band gap values of CdS thin film
samples were found to be in the range of 2.51 to 2.8 eV. Electrical resistivity
measurements were carried out in fourprobe Vander Pauw method at different
temperature. So CdS films may be a good candidate for suitable application in
various optoelectronic devices.