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Effect of Reactant concentration on Structural and Optical properties of ZnS - PVA nanocomposite

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Author Affiliations

  • 1 Department of Instrumentation and USIC, Gauhati University, Guwahati -781014, Assam, INDIA

Res. J. Physical Sci., Volume 3, Issue (6), Pages 16-19, August,4 (2015)

Abstract

ZnS-PVA nanocomposite thin films are deposited on glass substrate by chemical route. Effect of reactant concentration on the as synthesized ZnS-PVA nanocomposites are studied by taking three different concentrations of zinc source keeping the sulphur source concentration fixed. For structural and morphological studies the as synthesized thin films are characterized by using XRD and TEM. The X-ray diffractogram of the samples show wurtzite structure with preferred orientations along (002), (110) and (112) planes. The crystallite sizes of the films are found to vary from 3.54 - 4.09 nm which are in good agreement with TEM results. The bandgap of the synthesized nanomaterials are calculated using UV- visible spectral analysis and bandgap plot. The bandgap value is found to be within the range 3.7-3.8eV. Also we have used photoluminescence study to identify the defects in the nanostructure.

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