Study of structural and optical properties of ZnS:Cr nanoparticles synthesized by co-precipitation method

A  Rahdar; H  Asnaasahri Eivari  and R  Sarhaddi

doi:10.17485/ijst/2012/v5i1.28

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Indian Journal of Science and Technology

DOI: 10.17485/ijst/2012/v5i1.28

Year: 2012, Volume: 5, Issue: 1, Pages: 1-4

Original Article

Study of structural and optical properties of ZnS:Cr nanoparticles synthesized by co-precipitation method

A. Rahdar¹ , H. Asnaasahri Eivari¹ and R. Sarhaddi^{2 *}

¹Department of Physics²Physics Department [email protected]*,
[email protected]*
*Author For Correspondence
A. Rahdar
¹Department of PhysicsEmail:[email protected]*,

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

In this paper, we report structural and optical properties of nanocrystalline chromium (Cr) doped ZnS particle, which have been synthesized by co-precipitation method. The structural properties of ZnS:Cr nanoparticles have been characterized by X-ray diffraction (XRD) analysis. The XRD patterns show hexagonal structure in nanoparticles without any additional phase. The mean crystallite size calculated from the XRD patterns has been found in the range 2.45- 1.50 nm with the increase in molar concentration of doping agent. Absorption spectra have been obtained using UV-Vis spectrophotometer to find the optical direct band gap. The obtained values have been founded to being range 3.82- 4.42 eV. It was also found that optical band gap (Eg) increases with the increase in molar concentration of doping agent is attributed to size quantization effect due to the small size of the particles.
Keywords: ZnS:Cr, Chemical co-precipitation, 2-Mercaptoethanol, Optical band gap