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Tb 3+ activated Sr 4 Al 14 O 25 phosphors were synthesized by the high temperature solid-state reaction. For the sample, the color of the photoluminescence (PL) was green, but that of the afterglow was blue. The spectral results indicated that the photoluminescence was mainly due to the transitions from 5 D 4 to the ground energy levels of Tb 3+...
The thermo-luminescence (TL) of rare earth ions RE 3+ (RE=Ln, excluding Pm, Eu and Lu) co-doped phosphors CaGa 2 S 4 :Eu 2+ , RE 3+ was studied between room temperature and 300°C, and 3D thermo-luminescence of the phosphors were measured from room temperature to 400°C. The basic material CaGa 2 S 4 :Eu 2+ , showed at least two bands in...
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