Abstract
The transition probabilities of Pr, Sm and Nd ions in sol-gel glasses are increased by addition of Al3+ as a result of lowering of the site symmetry in which the ion is situated. The addition of Al has even a greater effect on luminescent efficiencies than on absorption strengths. The effect is a result of a decrease of aggregation of the ions in presence of Al circumventing the cross-relaxation process.
Original language | English |
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Pages (from-to) | 325-329 |
Number of pages | 5 |
Journal | Materials Letters |
Volume | 37 |
Issue number | 6 |
DOIs | |
State | Published - Dec 1998 |
Keywords
- Absorption
- Fluorescence
- Rare earth ions
- Silica-alumina glasses
- Sol-gel