Reduction from Eu3+ to Eu2+ in BaAl2O4 : Eu phosphor prepared in an oxidizing atmosphere and luminescent properties of BaAl2O4 : Eu
Data(s) |
2007
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Resumo |
A reduction phenomenon of Eu3+ -> Eu2+ was observed for the first time when Eu3+ ions were doped into an AlO4-tetrahedron-containing compound BaAl2O4 in an oxidizing atmosphere of air by high-temperature solid-state reaction. X-ray powder diffraction patterns and photoluminescent spectra are used to confirm the compound structure and detect the simultaneous existence of both divalent and trivalent europium ions, respectively. The abnormal Eu3+ -> Eu2+ reduction is explained by a charge compensation model. Spectroscopic properties of BaAl2O4:Eu are discussed and Eu2+ emission spectrum shows consistence with the results reported by Katsumata et a]. [J. Cryst. Growth 198/199 (1999) 869.] and Lin et al. [Mater. Chem. Phys. 70 (2001) 156.]. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Peng MY;Hong GY.Reduction from Eu3+ to Eu2+ in BaAl2O4 : Eu phosphor prepared in an oxidizing atmosphere and luminescent properties of BaAl2O4 : Eu,JOURNAL OF LUMINESCENCE,2007 ,127(2):735-740 |
Palavras-Chave | #RARE-EARTH IONS #VALENCE-CHANGE #CRYSTAL-STRUCTURE #EUROPIUM IONS #AIR #ALUMINATE #BARIUM #EMISSION #CASO4-EU #GLASS |
Tipo |
期刊论文 |