Abstract
This paper is aimed at explaining the effects of Tb3+ concentration on structure and luminescence properties and clarifying the concentration quenching mechanism of Tb3+. The lattice of BaF2 decreases with the increase of Tb3+ ions concentration. The emission spectrum of BaF2:Tb3+ consists of blue emission band and green emission band and corresponds to the transition of 5D3→7F J (J = 0, 1, 2, 4, 5, 6) and 5D4 → 7F J (J = 2, 3, 4, 5, 6) of Tb3+. The optimum concentration of Tb3+ is 4 mol%, and the concentration quenching mechanism of Tb3+ can be interpreted by the dipole–quadrupole (d–q) interaction.
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