Abstract
Mn-doped ZnS nanoparticles are synthesized by simple and cost effective chemical precipitation method. This diluted magnetic semiconductor is characterized by various techniques such as energy dispersive X-ray analysis, scanning electron microscopy, X-ray diffraction, photoluminescence and UV–Vis spectroscopy. High purity of the sample is confirmed by energy dispersive X-ray analysis. Sub-micrometer nanocrystals are observed using scanning electron microscope. Hexagonal phase of the material is confirmed by X-ray diffraction studies, and the micro-structural properties such as grain size, strain, dislocation density and texture coefficient are examined. High value of texture coefficient indicates the well-crystalline nature of the material. The band gap, Urbach energy and steepness parameter are calculated from the absorption spectrum. The band gap is also calculated from photoluminescence. The Stokes’s shift, Urbach energy and steepness parameter are reported in the case of Mn-doped ZnS for the first time.
Highlights
Recent advances in nanotechnology and various quantum size effects in nano-scale particles imply that many novel devices of the future will be based on properties of nanomaterials [1]
Mn-doped ZnS nanoparticles are synthesized by simple and cost effective chemical precipitation method. This diluted magnetic semiconductor is characterized by various techniques such as energy dispersive X-ray analysis, scanning electron microscopy, X-ray diffraction, photoluminescence and UV–Vis spectroscopy
We report the micro-structural, morphological and optical studies of Mn-doped ZnS nanoparticles prepared by chemical precipitation method
Summary
Recent advances in nanotechnology and various quantum size effects in nano-scale particles imply that many novel devices of the future will be based on properties of nanomaterials [1]. In order to tune surface states, energy levels, electrical, optical and magnetic properties of semiconductor material, doping with proper element is widely used [6]. Different synthesis methods are available to prepare Mn-doped ZnS semiconductors such as chemical precipitation method, zeolite and vapor phase condensation method [11]. We report the micro-structural, morphological and optical studies of Mn-doped ZnS nanoparticles prepared by chemical precipitation method. The techniques such as energy dispersive X-ray analysis (EDX), scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence and UV–Vis spectroscopy are used to study its properties. Lack of data on Stokes’s shift, Urbach energy and steepness parameter of Mn-doped ZnS has been the driving force behind this work
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