Photoluminescent behavior of SrBi2Nb2O9 powders explained by means of beta-Bi2O3 phase

Volanti, D. P.; Cavalcante, L. S.; Paris, E. C.; Simoes, A. Z.; Keyson, D.; Longo, V. M.; de Figueiredo, A. T.; Longo, Elson; Varela, José Arana; De Vicente, F. S.; Hernandes, A. C.

Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/34219

Title:

Photoluminescent behavior of SrBi2Nb2O9 powders explained by means of beta-Bi2O3 phase

Author(s):

Institution:

Universidade Estadual Paulista (UNESP)
Universidade Federal de São Carlos (UFSCar)
Universidade de São Paulo (USP)

ISSN:

0003-6951

Abstract:

Photoluminescence (PL) behavior of SrBi2Nb2O9 (SBN) powders was explained by means of beta-Bi2O3 phase on the SBN lattice. Oxygen vacancies and recombination of electrons holes in the valence band lead to the formation of [NbO5 center dot V-O(x)], [NbO5 center dot V-O(center dot)] and [NbO5 center dot V-O(center dot center dot)] complex clusters which are the main reason for the PL at room temperature. X-ray diffraction and Fourier transform Raman spectroscopy were used as tools to investigate the structural changes in SBN lattice allowing to correlate [NbO5 center dot V-O(center dot)]/[NbO6](') ratio with the evolution of the visible PL emission in the SBN powders. (c) 2007 American Institute of Physics.

Issue Date:

25-Jun-2007

Citation:

Applied Physics Letters. Melville: Amer Inst Physics, v. 90, n. 26, 3 p., 2007.

Time Duration:

3

Publisher:

American Institute of Physics (AIP)

Source:

http://dx.doi.org/10.1063/1.2753114

URI:

Access Rights:

Acesso restrito

Type:

outro

Source:

http://repositorio.unesp.br/handle/11449/34219

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