Visible to near-infrared down-conversion luminescence in Tb3+ and Yb3+ co-doped lithium–lanthanum–aluminosilicate oxyfluoride glass and glass-ceramics
| Autor: | Steven H. Morgan, R. Akrobetu, G. Sekar, Z. Pan, R. Mu |
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| Rok vydání: | 2012 |
| Předmět: |
Glass-ceramic
Materials science Analytical chemistry chemistry.chemical_element Mineralogy Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Ion Matrix (chemical analysis) chemistry Aluminosilicate law visual_art Materials Chemistry Ceramics and Composites Lanthanum visual_art.visual_art_medium Lithium Ceramic Luminescence |
| Zdroj: | Journal of Non-Crystalline Solids. 358:1814-1817 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2012.05.028 |
| Popis: | Tb 3 + and Yb 3 + co-doped oxyfluoride glasses were fabricated in a lithium–lanthanum–aluminosilicate matrix (LLAS) by a melt-quench technique. Glass-ceramics were obtained by appropriate heat treatment of the as-prepared glasses. Visible to near-infrared down-conversion luminescence was studied for glass and glass-ceramic samples with different Yb 3 + concentrations. It has been found that the luminescence intensity at 940–1020 nm from Yb 3 + ions increases while the emission lifetime of Tb 3 + ions decreases in the glass-ceramic compared to that in the as-prepared glass, which indicates that the energy transfer efficiency increases in the glass-ceramics compared to that in the as-prepared glass. The down-conversion luminescence also increased for increasing Yb 3 + concentration from 1 mol% to 2 mol%, but decreased for the sample with a high Yb 3 + co-doping concentration of 8 mol%, which is attributed to the concentration quenching. |
| Databáze: | OpenAIRE |
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