Authors: R SHRIVASTAVA S C SHRIVASTAVA
Publish Date: 2015/10/10
Volume: 38, Issue: 5, Pages: 1277-1284
Abstract
Tin Sndoped cadmium zinc sulphide nanoparticles CdZnS Sn were synthesized by the chemical bath deposition method with two different concentrations of Sn 2 and 4 mol Xray diffraction XRD pattern reveals the formation of CdZnS nanoparticles with cubic and hexagonal structure It was observed that the presence of Sn does not alter the structure of CdZnS Average crystallite size was measured from XRD data by using Scherrer’s formula From the study of absorption spectra bandtoband absorption was obtained at 460 and 490 nm respectively for the Sndoped 2 and 4 mol CdZnS nanoparticles Energy bandgap for undoped and Sndoped CdZnS varies from 35 to 29 eV with error ±005 eV The presence of Sn was confirmed by energydispersive Xray analysis The effect of dopant concentration on the photoluminescence PL intensity has also been studied The PL emission peak has been observed at 540 550 and 560 nm for the Sndoped CdZnS CdZnS 2 mol and CdZnS 4 mol respectively nanoparticles XRD and PL analyses demonstrate that the Sn2+ ions uniformly substitute Cd2+ sites or interstitial sites in CdZnS lattice which influence the optical properties Increase in the concentration of Sn shifts the UV–vis absorption spectra and PL emission spectra towards higher wavelength side Particle size and the crystallinity of CdZnS Sn nanoparticles were confirmed through atomic force microscopy
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