Photoluminescence and EPR spectrum of ZnO:Mn nanocrystals

Authors

  • O. V. Kovalenko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • M. F. Bulaniy Oles Honchar Dnipro National University, Dnipro, Ukraine
  • V. Y. Vorovskiy Oles Honchar Dnipro National University, Dnipro, Ukraine
  • O. V. Khmelenko Oles Honchar Dnipro National University, Dnipro, Ukraine

DOI:

https://doi.org/10.15421/331811

Keywords:

photoluminescence spectra, EPR spectra, ZnO:Mn nanocrystals, ultrasonic spray pyrolysis, heat treatment

Abstract

Nanocrystals of ZnO:Mn were obtained by ultrasonic spray pyrolysis and had dimensions of d ~ 36 nm. The changes of photoluminescence end EPR spectra of these nanocrystals in dependence of Mn admixture concentration ( 2–8 at. %) and also at heat treatment in air during 1 hour at T = 850 ̊C were investigated. It is shown that under short-term (7–10 s) nonequilibrium conditions of ZnO:Mn nanocrystals forming, they consist of a nuclens and shell surface, in which, predominantly, the Mn admixture is concentrated. After annealing, the Mn admixture diffuses into the nucleus of a nanocrystal.

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Published

03-12-2018

Issue

Vol. 26 No. 1 (2018)

Section

Articles