Micro-strain administered SHG intensity enhancement by heavy Ce doping in co-precipitated ZnO nanoparticles

Saikat Chattopadhyay, Ashok Kumawat, Kamakhya Prakash Misra, Nilanjan Halder, Atul Bandyopadhyay, Albin Antony, Ashok Rao, P. Poornesh, J. Jedryka, K. Ozga, B. Kucharska, R. D.K. Misra

Research output: Contribution to journalArticlepeer-review

Abstract

The objective of the present study is to explore the non-linear behaviour of Ce-doped ZnO system. Undoped and Ce-doped ZnO nanoparticles of size ~23–70 nm were prepared by sol-gel co-precipitation approach. There was complete absence of Ce-containing phase until 3 at.% dopant. Band-gap decreased in a linear manner from 3.262 to 3.212 eV on doping with Ce. Emission peaks at 360 and 380 nm were observed in the PL spectra. However, at 7 at.% dopant, CeO2 and Ce2O3 were observed. Interestingly, a significant increase in second harmonic generation (SHG) signal intensity of ~3.5 times was observed when the dopant concentration was increased from 3 to 7 at.% in ZnO nanoparticles. The SHG signal in doped-ZnO was governed by micro-strain such that it increased with decrease of micro-strain and vice-versa. The dependence of ZnO morphology and SHG intensity on Ce-dopant concentration in ZnO has potential for applications in bio-imaging and bio-sensing.

Original languageEnglish
Article number115041
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume266
DOIs
Publication statusPublished - 04-2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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