Mechanisms behind blue, green, and red photoluminescence emissions in CaWO4 and CaMoO4 powders
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
30/07/2007
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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 |