PL and TL behaviors of Ag-doped SnO2 nanoparticles: effects of thermal annealing and Ag concentration

  • Zeferino, R. Sanchez (Instituto de Fisica, Universidad Autonoma de Puebla) ;
  • Pal, U. (Instituto de Fisica, Universidad Autonoma de Puebla) ;
  • Melendrez, R (Centro de Investigacion en Fisica, Universidad de Sonora) ;
  • Flores, M. Barboza (Centro de Investigacion en Fisica, Universidad de Sonora)
  • Received : 2012.06.21
  • Accepted : 2013.10.23
  • Published : 2013.12.25


In this article, we present the effects of Ag doping and after-growth thermal annealing on the photoluminescence (PL) and thermoluminescence (TL) behaviors of $SnO_2$ nanoparticles. $SnO_2$ nanoparticles of 4-7 nm size range containing different Ag contents were synthesized by hydrothermal process. It has been observed that the after-growth thermal annealing process enhances the crystallite size and stabilizes the TL emissions of $SnO_2$ nanostructures. Incorporated Ag probably occupies the interstitial sites of the $SnO_2$ lattice, affecting drastically their emission behaviors on thermal annealing. Both the TL response and dose-linearity of the $SnO_2$ nanoparticles improve on 1.0% Ag doping, and subsequent thermal annealing. However, a higher Ag content causes the formation of Ag clusters, reducing both the TL and PL responses of the nanoparticles.


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