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Bandgap Saturation in Room Temperature Synthesized Cobalt Doped ZnS Nanoparticles



Author(s)

Sujan Kumar Das¹, Shahnaj Parvin¹, Ummay Honey¹, Md. Sohel Rana¹, Nasrin Jewena², Jahirul Islam Khandaker¹ and Farid Ahmed¹

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DOI:10.17265/2161-6213/2020.5-6.004

1. Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh
2. Department of Chemistry, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh

In this study, cobalt doped ZnS nanoparticles (NPs) have been synthesized by simple chemical precipitation method with six different weight percentages (0.0, 0.1, 0.3, 0.5, 0.7 and 1.0%) of cobalt content at room temperature (30 °C). X-ray diffraction (XRD) patterns of the samples revealed the formation of cubic structure and calculated particle size were found to be nano-sized. Optical band gap values have been obtained from UV-Vis absorption spectra. It has also been found that energy band gap (Eg) increases with the increase in molar concentration of reactant solution and the variation of bandgap was between 5.30-6.01 eV with cobalt doping.

ZnS, nanoparticles, cobalt doped, bandgap, precipitation method.