Luminescence Properties of Barium Thio- and Selenogallates Doped with Eu, Ce, and Eu plus Ce

作者：Yablonskii Gennadii P^*; Zubialevich Vitaly Z; Lutsenko Eugenii V; Pashaev Arif M; Tagiev Bahadir G; Tagiev Oktay B; Abushov Said A

来源：Japanese Journal of Applied Physics, 2011, 50(5): 05FG02.

DOI：10.1143/JJAP.50.05FG02

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 x 10(-4) - 1.25 x 10(6) W/cm(2). 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/cm(2), respectively. Possible reasons of the droop mechanisms are discussed.

• 出版日期2011-5