Descripción
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Novel silver based rare earth tungstate-molybdate, AgLn(MoO4)(WO4), with scheelite-like structure have been synthesized by ceramic method. The crystal structure, luminescence properties and fluorescence lifetime of a series compounds were investigated systematically. Some special characteristic emission bands were observed which can be attributed by the energy transfer between Ag+ and Ln3+ ions. Especially, AgDy(MoO4)(WO4) and AgHo(MoO4)(WO4) phosphors can emit white light under near-UV excitation, with chromaticity coordinates at about (0.3605, 0.3652) and (0.3559, 0.3479) respectively. Fluorescence lifetime of Eu3+ and Tb3+ were measured in both room temperature and liquid nitrogen temperature. In excitation spectra, the evident blue shift of charge transfer (CT) band in the case of liquid nitrogen temperature indicates that the effective W-O and Mo-O covalence bond is lower at liquid nitrogen temperature which can be caused by the lower wave function overlaps of W-O and Mo-O. Furthermore, low temperature showed positive effect for longer fluorescence lifetime. | |
Internacional
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Si |
JCR del ISI
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Si |
Título de la revista
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Journal of Luminescence |
ISSN
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0022-2313 |
Factor de impacto JCR
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2,732 |
Información de impacto
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Datos JCR del año 2017 |
Volumen
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DOI
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10.1016/j.jlumin.2019.02.047 |
Número de revista
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210 |
Desde la página
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255 |
Hasta la página
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260 |
Mes
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SIN MES |
Ranking
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