Luminescence Properties of Barium Thio- and Selenogallates Doped with Eu, Ce, and Eu+Ce
Autor: | G. P. Yablonskii, E. V. Lutsenko, O. B. Tagiev, Vitaly Z. Zubialevich, A. M. Pashaev, Bahadir G. Tagiev, Said A. Abushov |
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Rok vydání: | 2011 |
Předmět: | |
Zdroj: | Japanese Journal of Applied Physics. 50:05FG02 |
ISSN: | 1347-4065 0021-4922 |
Popis: | Photoluminescence properties of barium thio- and selenogallates doped with Eu2+, Ce3+ and co-doped with Eu2+ and Ce3+ were studied in a temperature range of 10–300 K and an optical excitation intensity interval of 3×10-4–1.25×106 W/cm2. Barium thiogallates doped with europium and co-doped by both rare-earth elements show a high thermal stability of the luminescence characteristics and significantly exceed the selenogallate analogues in respect of photoluminescence efficiency. Both thio- and selenogallates activated with the rare-earth elements demonstrate a considerable PL efficiency droop only at high excitation levels exceeding 20 and 10 kW/cm2, respectively. Possible reasons of the droop mechanisms are discussed. |
Databáze: | OpenAIRE |
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