Influence of Mg doping on structural, dielectric properties and Urbach energy in ZnO ceramics

Das, T and Das, D and Parashar, K and Parashar, SKS and Anupama, AV and Sahoo, B and Das, BK (2023) Influence of Mg doping on structural, dielectric properties and Urbach energy in ZnO ceramics. In: Journal of Materials Science: Materials in Electronics, 34 (31).

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Abstract

This study investigated the impact of magnesium doping on structural, optical, and dielectric properties of zinc oxide. Magnesium-doped ZnO (Zn1�xMgxO) samples were synthesized and characterized with varying doping levels (x = 0, 0.01, 0.02, 0.03) using solid state reaction, employing techniques including X-ray Diffraction(XRD), Field Emission Scanning Electron Microscopy (FESEM), Impedance Spectroscopy and Diffuse Reflectance Spectroscopy (DRS). The synthesized samples show single-phase hexagonal wurtzite structure, indicating successful doping of magnesium in ZnO lattice. FESEM micrograph revealed voids in doped samples. Doping reduces the dielectric constant of ZnO and shows dielectric loss > 200 °C in doped sample. Magnesium doping decreased ZnO�s band gap, altering its electronic properties and optical behavior. Urbach energy increased with doping and inversely linked to dielectric constant. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Item Type:	Journal Article
Publication:	Journal of Materials Science: Materials in Electronics
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer
Keywords:	Dielectric losses; Electronic properties; Energy gap; Field emission microscopes; II-VI semiconductors; Magnesium; Optical properties; Scanning electron microscopy; Solid state reactions; Zinc sulfide, Dielectrics property; Doped sample; Doped ZnO; Field emission scanning electron microscopy; Magnesium doping; Mg-doping; Optical and dielectric properties; Synthesised; Urbach energy; ZnO ceramic, Zinc oxide
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	28 Feb 2024 13:10
Last Modified:	28 Feb 2024 13:10
URI:	https://eprints.iisc.ac.in/id/eprint/83673

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