Synthesis,optical properties,and energy transfer of Ce³⁺,Tb³⁺ doped KLu₂F₇

曹春燕^1,2，谢安^1,2

1. School of Materials Science and Engineering,Xiamen University of Technology2. Key Laboratory of Functional Materials and Applications of Fujian Province

摘 要：Ce³⁺, Tb³⁺ doped orthorhombic phases of KLu₂F₇ microcrystals with hexagonal disk morphology were synthesized by a hydrothermal method. Enhanced emissions of Tb³⁺ were observed in the Ce³⁺/Tb³⁺ co-doped KLu₂F₇ sample compared to the Tb³⁺ single-doped KLu₂F₇. The energy transfer efficiency from Ce³⁺ to Tb³⁺ was calculated by the photoluminescence intensity in the Ce³⁺/Tb³⁺ co-doped KLu₂F₇ samples. The average separations between Ce³⁺ and Tb³⁺ were calculated and the critical distance was 0.922 nm estimated by method of concentration quenching. The theoretical calculation proved the results. The theoretical analysis also suggested that the energy transfer from Ce³⁺ to Tb³⁺ in the KLu₂F₇ occurred predominantly via the dipole-quadrupole interaction. The KLu₂F₇ should be good host materials for emitters.

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