Synthesis Of Functional Rare Earth Micro/Nano Fluoride Materials

In this thesis, the rare earth doped fluoride micro / nano luminescent materials were synthesized by the oleic acid assisted hydrothermal method using KZn F₃ and Na Lu F₄ as host lattices. The contents include following aspects:1. KZnF₃: Ln³⁺(Ln³⁺ = Eu³⁺, Tb³⁺, Eu³⁺/Tb³⁺, Eu³⁺/Tb³⁺/Tm³⁺) cubic phase crystals were prepared by the oleic acid assisted hydrothermal synthesis method. For KZn F₃: Eu³⁺, Tb³⁺ samples, the energy transfer mechanism and pathway were proposed by comparing the experimental data and theoretical calculation. By adjusting the doping concentration of Tm³⁺ ions in KZn F₃: 0.05 Tb³⁺, 0.07 Eu³⁺, z Tm³⁺, a white emission in a single composition was obtained.2. NaLuF₄: Ce³⁺, Tb³⁺ hexagonal crystals were synthesized by the oleic acid assisted hydrothermal synthesis method. The effect of doping concentration on luminescent properties of the sample were studied, and the energy transfer mechanism of Ce³⁺?Tb³⁺ were also discussed in detail.3. NaLuF₄ up�conversion phosphors were synthesized by the oleic acid assisted hydrothermal synthesis method. The effects of different concentrations of doping Yb³⁺ on the proportion of the emission of the red / green of Er³⁺ were studied. The white emission in Na Lu F₄ matrix was achieved by co-doping Yb³⁺, Er³⁺, Tm³⁺.