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Clabau, F., Rocquefelte, X., Jobic, S., Deniard, P., Whangbo, M.-H., Garcia, A. & Le Mercier, T. (2007) On the phosphorescence mechanism in SrAl2O4 : Eu2+ and its codoped derivatives. Solid State Sci. 9 608–612.
Added by: Laurent Cournède (2016-03-10 22:02:30) |
| Type de référence: Article DOI: 10.1016/j.solidstatesciences.2007.03.020 Numéro d'identification (ISBN etc.): 1293-2558 Clé BibTeX: Clabau2007 Voir tous les détails bibliographiques  |
Catégories: MIOPS Mots-clés: dopant, dy3+, electron trap, eu2+, long, mechanism, orange, persistent luminescence, Phosphorescence, red, sral2o4, trap depth Créateurs: Clabau, Deniard, Garcia, Jobic, Le Mercier, Rocquefelte, Whangbo Collection: Solid State Sci. |
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| Résumé |
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The mechanism of phosphorescence in SrAl2O4:Eu,Dy material is discussed on the basis of a thermo-activated release of electrons trapped at oxygen vacancy sites. The depths and concentration of the electron traps are strongly affected by codoping with trivalent lanthanide cations Ln(3+). This finding is rationalized by comparing the ionization potentials of the dopant cation Eu2+, the codopant cation Ln(3+) and the substituted cation Sr2+. Such a use of ionization potentials provides a practical guide with which the variation of the phosphorescent decay time in the codoped derivatives of SrAl2O4:Eu is predicted. (c) 2007 Elsevier Masson SAS. All rights reserved.
Added by: Laurent Cournède |