Volanti, D. P.Cavalcante, L. S.Paris, E. C.Simoes, A. Z.Keyson, D.Longo, V. M.de Figueiredo, A. T.Longo, Elson [UNESP]Varela, José Arana [UNESP]De Vicente, F. S.Hernandes, A. C.2014-05-202014-05-202007-06-25Applied Physics Letters. Melville: Amer Inst Physics, v. 90, n. 26, 3 p., 2007.0003-6951http://hdl.handle.net/11449/34219Photoluminescence (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.3engArtigo10.1063/1.2753114WOS:000247625500035Acesso abertoWOS000247625500035.pdf23547399804067250000-0001-9315-9392