Peculiarities of doping of ZnO:Mn nanocrystals during their synthesis by the aerosol pyrolysis method

Authors

  • O. V. Kovalenko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • V. Yu. Vorovsky Oles Honchar Dnipro National University, Dnipro, Ukraine
  • O. V. Khmelenko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • Ye. G. Plakhtii Oles Honchar Dnipro National University, Dnipro, Ukraine

DOI:

https://doi.org/10.15421/332027

Keywords:

zinc oxide, manganese, ultrasonic aerosol pyrolysis, nanocrystal, heat treatment

Abstract

Samples of ZnO:Mn nanocrystals with Mn concentrations of 2 and 4 at.% were synthesized by ultrasonic aerosol pyrolysis. The synthesis was carried out at 550°C using aqueous solutions of zinc and manganese nitrates. The samples obtained were subjected to heat treatment at 550°C and 850°C in air for 1 hour. The study of the samples by XRD and EPR methods shows that during the synthesis the process of doping ZnO nanocrystals with manganese occurs only partially, on the surface, in the near-surface layer. Residues of the Mn impurity are located on the surface of nanocrystals and appear during annealing at 550°С in the form of manganese oxides (Mn2O3). During heat treatment at 850°C, decomposition of Mn2O3 and bulk doping of ZnO:Mn nanocrystals occur.

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Published

09-12-2020

Issue

Vol. 28 No. 2 (2020)

Section

Articles