Artículo de revista
Evolution of the doping regimes in the Al-doped SnO2 nanoparticles prepared by a polymer precursor method
Fecha
2015Registro en:
Journal of Physics - Condensed Matter. Volumen: 27 Número: 9
DOI: 10.1088/0953-8984/27/9/095301
Autor
Aragón, F. H.
Coaquira, J. A. H.
Villegas Lelovsky, L.
Silva, S. W. da
Cesar, D. F.
Nagamine, L. C.
Cohen, R.
Menéndez Proupin, Eduardo
Morais, P. C.
Institución
Resumen
In this study, we report on the structural and hyperfine properties of Al-doped SnO2 nanoparticles synthesized by a polymer precursor method. The x-ray diffraction data analysis carried out using the Rietveld refinement method shows the formation of only rutile-type structures in all samples, with decreasing of the mean crystallite size as the Al content. A systematic study of the unit cell, as well as the vicinity of the interstitial position show strong evidence of two doping regimes in the rutile-type structure of SnO2. Below 7.5 mol% doping a dominant substitutional solution of Al+3 and Sn4+-ions is determined. However, the occupation of both substitutional and interstitial sites is determined above 7.5 mol% doping. These findings are in good agreement with theoretical ab initio calculations.