Near infrared long-persistent phosphorescence in SrAl(2)O(4):Eu(2 ), Dy(3 ), Er(3 ) phosphors based on persistent energy transfer

作者：Yu Naiyin; Liu Feng; Li Xufan; Pan Zhengwei^*

来源：Applied Physics Letters, 2009, 95(23): 231110.

DOI：10.1063/1.3272672

Eu(2 ), Dy(3 ), and Er(3 ) ions codoped SrAl(2)O(4) phosphors with near infrared (NIR) (t 1530 nm) long-persistent phosphorescence were synthesized by a combustion method. The NIR phosphorescence emission was realized through a persistent energy transfer process from Eu(2 ) ions to Er(3 ) ions. Optimal Er(3 ) concentration for the maximum energy transfer efficiency was determined and NIR phosphorescence persisting for more than 10 min was achieved. A model of charge trapping and energy transfer process among Eu, Dy, and Er ions in SrAl(2)O(4) host was proposed.

• 出版日期2009-12-7