Electronic processes in doped ZnO nanopowders

Functional Materials and Nanotechnologies 2018

Grigorjeva, Larisa^1 ; Zolotarjovs, Aleksejs^1 ; Bite, Ivita^1 ; Grube, Jurgis^1 ; Millers, Donats^1

Institute of Solid State Physics UL, Kengaraga, 8, Riga

LV-1063, Latvia^1

关键词: Comparative analysis;    Doped nanocrystals;    Electronic process;    Heliotron reactors;    Luminescence decay time;    Radioluminescence spectra;    Solar irradiation;    ZnO single crystals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/503/1/012017/pdf
DOI  :  10.1088/1757-899X/503/1/012017

来源: IOP

【 摘 要 】

ZnO nanocrystals, undoped and doped with Iridium or Indium were prepared by solar irradiation in Heliotron reactor in PROMES CNRS facilities, France. The comparative analysis of the excitonic spectra of ZnO single crystal and ZnO nanocrystals (NCs) doped with In and Ir was performed. It is shown that the excitonic processes in Ir doped nanocrystals coincide well with electronic processes in undoped NC and single crystal; however, the electronic processes in In-doped nanocrystals are significantly different from those in single crystal. The radioluminescence spectra of ZnO:In was analysed and additional luminescence band at ∼3.18 eV was detected due to In-doping. The luminescence decay time depends on In concentration in nanocrystals and is significantly less in ZnO:In compared with undoped nanocrystals. The fast scintillation of ZnO:In makes this material promising for application.