Luminescence and energy transfer in Dy3+/Tb3+ co-doped CaO–Al2O3–B2O3–RE2O3 glass

Abstract The new calcium aluminoborate glasses with the composition of CaO–Al2O3–B2O3–RE2O3 (RE = Dy and Tb) were synthesized and the luminescence of Dy3+ and Tb3+ was investigated. The results show that the emission intensity of Tb3+ ion was enhanced when introducing Dy3+ ion into CaO–Al2O3–B2O3–Tb2O3 glass due to the energy transfer processes between Dy3+ and Tb3+. The energy transfer efficiencies, transfer probabilities as well as donor–acceptor critical distances were also calculated. The energy transfer mechanism between Dy3+ and Tb3+ ions is electric dipole–dipole interaction, which can be concluded by both fluorescence decay and emission intensity ratio varieties.

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