Abstract
The new calcium aluminoborate glasses with the composition of CaO–Al 2O 3–B 2O 3–RE 2O 3 (RE = Dy and Tb) were synthesized and the luminescence of Dy 3+ and Tb 3+ was investigated. The results show that the emission intensity of Tb 3+ ion was enhanced when introducing Dy 3+ ion into CaO–Al 2O 3–B 2O 3–Tb 2O 3 glass due to the energy transfer processes between Dy 3+ and Tb 3+. The energy transfer efficiencies, transfer probabilities as well as donor–acceptor critical distances were also calculated. The energy transfer mechanism between Dy 3+ and Tb 3+ ions is electric dipole–dipole interaction, which can be concluded by both fluorescence decay and emission intensity ratio varieties.
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