| Conţinutul numărului revistei |
| Articolul precedent |
| Articolul urmator |
 212 0 |
 SM ISO690:2012NAZAROV, Michael V., NOH, Do Young, SOHN, Jongrak, YOON, Chulsoo. Influence of additional Eu3+ coactivator on the luminescence properties of Tb3Al5O12:Ce3+, Eu3+. In: Optical Materials, 2008, vol. 30, pp. 1387-1392. ISSN 0925-3467. DOI: https://doi.org/10.1016/j.optmat.2007.07.005 |
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  Optical Materials |
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| Volumul 30 / 2008 / ISSN 0925-3467 | |
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| DOI:https://doi.org/10.1016/j.optmat.2007.07.005 | |
| Pag. 1387-1392 | |
| Rezumat | |
The luminescence properties of doubly activated terbium aluminium garnet samples were investigated in the present study. Commercial Tb3Al5O12:Ce3+ (TAG:Ce) shows the typical Ce3+ ion luminescence of the allowed Ce3+ d-f transition. Eu3+ co-doping, however, reveals interesting results. In TAG:Ce, Eu, both Ce3+ and Eu3+ luminescence was measured at different Ce and Eu activator concentrations. The Ce3+ ion can be used as a sensitizer in the TAG lattice that transfers its energy directly or via the Tb sublattice to the activator Eu3+. The energy-level diagram was proposed to explain the luminescence mechanism. Application of TAG:Ce, Eu with improved chromaticity coordinates CIE (Commission Internationale de l'Eclairage) and color rendering index (CRI) in light emitting diodes (LEDs) is demonstrated. |
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| Cuvinte-cheie chemical synthesis, Luminescence, optical properties, Phosphor |
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