Luminescence properties of Ce³⁺ and Tb³⁺ doped rare earth borate glasses

Ce³⁺- and Tb³⁺-doped rare earth borate glasses were synthesized and their luminescence properties have been studied. The sample containing Ce³⁺ ions has a strong purplish-blue emission and that doped with Tb³⁺ emits a green light under UV excitation. The Ce³⁺ ions in the host form two kinds of emission centers, owing to different lattice sites occupied by Ce³⁺ in the host glass. In the Ce³⁺ and Tb³⁺ co-activated samples the Ce³⁺ ions strongly sensitize the luminescence of the Tb³⁺ ions.