| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1506534 | Solid State Sciences | 2007 | 5 Pages |
Abstract
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 Ln3+. This finding is rationalized by comparing the ionization potentials of the dopant cation Eu2+, the codopant cation Ln3+ 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.
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Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Frédéric Clabau, Xavier Rocquefelte, Stéphane Jobic, Philippe Deniard, Myung-Hwan Whangbo, Alain Garcia, Thierry Le Mercier,