Traps distribution in sol-gel synthesized ZnO nanoparticles

Delice S., IŞIK M., Gasanly N.

MATERIALS LETTERS, vol.245, pp.103-105, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 245
  • Publication Date: 2019
  • Doi Number: 10.1016/j.matlet.2019.02.123
  • Journal Name: MATERIALS LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.103-105
  • Keywords: Nanoparticles, Defects, Luminescence, THERMOLUMINESCENCE PROPERTIES, LUMINESCENCE
  • Middle East Technical University Affiliated: Yes

Abstract

The distribution of shallow traps within the sol-gel synthesized ZnO nanoparticles was investigated using thermoluminescence (TL) experiments in the 10-300 K temperature range. TL measurements presented two overlapped peaks around 110 and 155 K. The experimental technique based on radiating the nanoparticles at different temperatures (T-exc.) between 60 and 125 K was carried out to understand the trap distribution characteristics of peaks. It was observed that peak maximum temperature shifted to higher values and activation energy (E-t) increased as irradiating temperature was increased. The E-t vs. T-exc. presented that ZnO nanoparticles have quasi-continuously distributed traps possessing activation energies increasing from 80 to 171 meV. (C) 2019 Elsevier B.V. All rights reserved.