Structure and White Luminescence of Eu-Activated (Ba,Sr)13−xAl22−2xSi10+2xO66 Materials

The optical properties of Eu-activated (Ba,Sr)13−xAl22−2xSi10+2xO66 materials have been determined after the structural reinvestigation of the hypothetical Ba13Al22Si10O66 material on the basis of the Gebert's model. The white fluorescence and phosphorescence of the (Ba,Sr)13−xAl22−2xSi10+2xO66...

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Published inInorganic chemistry Vol. 47; no. 10; pp. 4226 - 4235
Main Authors DENIS, Grégoire, DENIARD, Philippe, GAUTRON, Eric, CLABAU, Frédéric, GARCIA, Alain, JOBIC, Stéphane
Format Journal Article
LanguageEnglish
Published American Chemical Society 19.05.2008
Subjects
Chemical Sciences
Material chemistry
Fluorescence
Phosphorescence
Europium
Optical properties
Luminescence
Materials
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Summary:The optical properties of Eu-activated (Ba,Sr)13−xAl22−2xSi10+2xO66 materials have been determined after the structural reinvestigation of the hypothetical Ba13Al22Si10O66 material on the basis of the Gebert's model. The white fluorescence and phosphorescence of the (Ba,Sr)13−xAl22−2xSi10+2xO66:Eu series result from the existence of two broad emission bands associated with 8H-4f65d1 → 8S-4f7 transitions peaking at 534 and 438 nm, the intensities of which may be tuned at room temperature via the control of the europium concentration and the substitution of Sr for Ba. This suggests the possibility to adjust the emission of the material to white LED requisites.
Bibliography:Table showing the atomic positions of undoped R-BASO (Ba12.34Al20.62Si11.32O66) and P-BASO (Ba12.44Al20.88Si11.12O66). This material is available free of charge via the Internet at http://pubs.acs.org.
ark:/67375/TPS-PN1DP4PD-1
istex:0F3E3D9FD23FAD2B1AF46AF9298863884F36A074
ISSN:0020-1669
1520-510X
DOI:10.1021/ic702240q