Luminescence properties and energy transfer of K3LuF6:Tb3+,Eu3+ multicolor phosphors with a cryolite structure |
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Authors: | Dan Yang Libing Liao Qingfeng Guo Lefu Mei Haikun Liu Tianshuai Zhou Huan Ye |
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Affiliation: | Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083 China.; School of Gemology, China University of Geosciences, Beijing 100083 China ; Jewelry and Mineral Materials Laboratory of Experimental Teaching Demonstration Center, Beijing China |
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Abstract: | In recent years, compounds with a cryolite structure have become excellent hosts for luminescent materials. In this paper, Tb3+ doped and Tb3+/Eu3+ co-doped K3LuF6 phosphors were prepared via a high temperature solid phase sintering method. The XRD, SEM, as well as photoluminescence excitation (PLE) and emission (PL) spectra were measured to investigate the structure and luminescence properties of the as-prepared samples. In the Tb3+/Eu3+ co-doped K3LuF6 samples, both characteristic emission spectra of Tb3+ and Eu3+ could be observed and the emission color of the K3LuF6:0.12Tb3+,xEu3+ phosphors could be adjusted from green to yellowish pink and the corresponding CIE values could be regulated from (0.2781, 0.5407) in the green area to (0.4331, 0.3556) in the yellowish pink area by controlling the concentration ratio of Eu3+/Tb3+. In addition, the energy transfer mechanism in Tb3+/Eu3+ co-doped K3LuF6 was calculated to be a quadrupole–quadrupole interaction from Tb3+ to Eu3+ based on the Dexter''s equation.Single-phase multicolor phosphors with a cryolite structure were obtained via energy transfer from Tb3+ to Eu3+. |
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