Effect of Cr Doping on Structural, Optical and Dielectric Properties of ZnO Nanoceramics Synthesized by Mechanical Alloying

Das, BK and Das, T and Parashar, K and Parashar, SKS and Kumar, R and Anupama, AV and Sahoo, B (2020) Effect of Cr Doping on Structural, Optical and Dielectric Properties of ZnO Nanoceramics Synthesized by Mechanical Alloying. In: Electronic Materials Letters, 16 (3). pp. 255-263.

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Abstract

The present work, Cr doped ZnO nanoceramics abbreviated as Zn1-xCrxO (x = 0, 0.01, 0.03) synthesized by mechanical alloying. The structural, morphological, dielectric and optical properties of the synthesized samples were studied by using X-ray diffraction (XRD), Field Emission Scanning Electron Microscopic analysis (FE-SEM), UV–Visible spectroscopy (UV–Vis) and Impedance analyzer respectively. The structural parameters were measured by Rietveld method. The result shows the formation of single phase nanoceramics with hexagonal wurtzite structure with space group P63mc. The crystallite size was found to decrease with increase in Cr concentration (~ 20 nm) and broadening of XRD peak exists in the samples. FE-SEM result shows that incorporation of Cr changes the surface morphology of ZnO. The band gap energy (Eg) at room temperature was measured using Tauc relation and was found to decreases with increase in Cr concentration. The dielectric constant (ε) value of ZnO decreases with Cr doping and with increase in concentration the peak shifted towards higher temperature region

Item Type:	Journal Article
Publication:	Electronic Materials Letters
Publisher:	Korean Institute of Metals and Materials
Additional Information:	The copyright of this article belongs to Korean Institute of Metals and Materials
Keywords:	Chromium; Dielectric materials; Dielectric properties; II-VI semiconductors; Mechanical alloying; Rietveld refinement; Zinc oxide, Cr-doping; Nano ceramics; Optical and dielectric properties, Zinc alloys
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	30 Jun 2020 06:41
Last Modified:	30 Jun 2020 06:41
URI:	http://eprints.iisc.ac.in/id/eprint/64898

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