Effect of concentration of Ce³⁺ and Sm³⁺ on luminescence performance of YLuAG phosphors

Y 3-1.5-y-z Lu 1.5 Al 5 O 12 :Ce 3+ y, Sm 3+ z nearly spherical phosphors were synthesized by using NaF-NaCl-KCl as the molten salt and calcining in a weak reducing atmosphere. The effects of Ce 3+ and Sm 3+ concentration on crystal structure and luminescence performance of YLuAG phosphors were studied, and the energy transfer between Ce 3+ and Sm 3+ was discussed. The results showed that the optimal doping concentration of Ce 3+ is 0.10 mol in YLuAG phosphors. When the concentration of Ce 3+ is 0.1 mol, the optimal doping concentration of Sm 3+ is 0.01 mol. Doping Sm 3+ can add the emission peak in the red light region and improve the color rendering index (CRI) of YLuAG: Ce 3+ phosphors.