Preparation and Luminescence Properties of PbF₂:Er³⁺,Yb³⁺ Up-conversion Light-emitting Materials

Er³⁺, Yb³⁺ co-doped PbF₂(PbF₂:Er³⁺,Yb³⁺) matrix up-conversion luminescence materials were prepared by a hydrothermal method with the NaF and NH₄HF₂ as fluorine source. A bright green light appears under 1 064 nm laser excitation at room temperature. The phase and morphology of the materials were characterized by scanning electron microscopy and X-ray diffraction, respectively. The influences of annealing temperature and rare earth ions Er³⁺/Yb³⁺doping mole ratio on the up-conversion luminescence of PbF₂:Er³⁺,Yb³⁺ sample were investigated. The results show that the PbF₂:Er³⁺,Yb³⁺ sample has a greater luminescence intensity when the annealing temperature and reaction time are 550 and 48 h. The optimum luminescence properties of the PbF₂:Er³⁺,Yb³⁺ sample prepared can be obtained when the doping mole ratio of Er³⁺/Yb³⁺ ions is 1:9.