Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403799 | Journal of Luminescence | 2008 | 7 Pages |
Abstract
Searching for the multiple sites predicted in the literature for the europium activator in the BaMgAl10O17:Eu2+ phosphor, we undertook a detailed structural study using synchrotron powder diffraction. Three different positions were found for Eu2+ in the Beevers-Ross site, near the mid-oxygen position and in substitution for the interblocks Al-O-Al bridge. By favoring the migration of the activator ion, the resulting vacancies in the Beevers-Ross sites may be a major cause of the degradation of the phosphor.
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Authors
Juliette Lambert, Gilles Wallez, Michel Quarton, Thierry Le Mercier, Wouter van Beek,