Mechanisms behind blue, green, and red photoluminescence emissions in CaWO4 and CaMoO4 powders


Autoria(s): Campos, A. B.; Simoes, A. Z.; Longo, Elson; Varela, José Arana; Longo, V. M.; de Figueiredo, A. T.; De Vicente, F. S.; Hernandes, A. C.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

30/07/2007

Resumo

A combined experimental and theoretical study was conducted to analyze the photoluminescence (PL) properties of ordered and disordered CaWO4 (CW) and CaMoO4 (CM) powders. Two mechanisms were found to be responsible for photoluminescence emission in CW and CM powders. The first one, in the disordered powders, was caused by oxygen complex vacancies [MO3 center dot V-O(x)], [MO3 center dot V-O(center dot)] and [MO3 center dot V-O(center dot center dot)], where M=W or Mo, which leads to additional levels in the band gap. The second mechanism, in ordered powders, was caused by an intrinsic slight distortion of the [WO4] or [MoO4] tetrahedral in the short range. (c) 2007 American Institute of Physics.

Formato

3

Identificador

http://dx.doi.org/10.1063/1.2766856

Applied Physics Letters. Melville: Amer Inst Physics, v. 91, n. 5, 3 p., 2007.

0003-6951

http://hdl.handle.net/11449/34141

10.1063/1.2766856

WOS:000248595800051

WOS000248595800051.pdf

Idioma(s)

eng

Publicador

American Institute of Physics (AIP)

Relação

Applied Physics Letters

Direitos

closedAccess

Tipo

info:eu-repo/semantics/article