Effect on optical and structural parameters in heavy Ca-doped ZnO nanostructures. (29th July 2021)

• Record Type: Journal Article
• Authors: Misra, Kamakhya Prakash; Kumawat, Ashok; Shahee, Aga; Chattopadhyay, Saikat
• Is Part Of: Materials technology. Volume 36:Number 9(2021)
• Page Start: 529
• Page End: 540
• Publication Date: 2021-07-29
• Subjects: Ca doped ZnO -- heavy doping -- sol-gel co-precipitation -- nanostructure -- photoluminescence; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Technological innovations -- Periodicals; 620.1105
• DOI: 10.1080/10667857.2020.1776028
• Languages: English
• ISSNs: 1066-7857

Abstract

ABSTRACT: Undoped and Ca doped ZnO Wurtzite nanostructures were prepared via sol-gel co-precipitation. Heavy Ca doping causes structural deterioration due to larger ionic radius of Ca 2+ . Strain-induced deformation has been analysed by W-H method. Rietveld analysis has revealed changes in bond length due to doping. Optical transparency and band gap have been determined by UV-Vis and Tauc's plot, respectively. Band gap is seen to increase with doping. PL study with three different excitation wavelengths, before and after heat treatment of the samples, recommends that 300 nm is the most suitable for obtaining emission in the blue region. SEM has revealed that the low amount of doping causes clustering of particles, but heavy doping reduces it.