Synthesis and XRD/PL studies of pure and Sb2O3 doped ZnO nanophases

Nora Boulares 1Kamel Guergouri 1Claude J. Monty 2

1. Laboratoire de Physique-chimie des semiconducteurs (LPCS), Université Mentouri Constantine, Constantine 25000, Algeria
2. CNRS laboratoire Procedes, Materiaux et Energie solaire (PROMES), BP5 Odeillo, Font-Romeu 66120, France

Abstract

The synthesis of pure and Sb2O3 ( 0 to 5% molar fraction ) doped ZnO has been realized by sublimation-condensation method in a solar furnace. The characterization of the initial and final powders was done by means of XRD and PL techniques.

The XRD obtained results showed: the formation of a new phase Zn7O2Sb12 in the micropowders which disappears in the nanopowders. These results showed also a small increase of the grain size as a function of Sb2O3 concentration in the nanopowders. The analysis of the photoluminescence spectra allowed us to establish the following features: a decrease of D°X and D+X and an increase of A°X peaks when the Sb2O3 concentration increases for the micropowders and an increase of D+X and no change in A°X and no peak shift and a disappearance of X peak as far as nanopowders are concerned for all considered compositions.

 

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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium C, by Kamel Guergouri
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-04-27 10:23
Revised:   2009-06-07 00:44