The Synthesis And Performance Research Of Fluoride Luminescent Material

Compared with other oxides and organic matter, inorganic fluoride has low refractive index high optical transparency etc. And because it has a lower phonon energy, strong ionicity, electron cloud characteristics such as small and extension effect, it makes the inorganic fluoride can have easy to store and has an excellent characteristics of photon energy conversion and transmission. In the aspect of application, inorganic fluoride have a wide range of applications in lighting medical equipment information transmission. Especially the doping rare earth elements of inorganic fluoride because of its unique structure, excellent physical and chemical properties, often used as functional materials.In this paper, the preparation of LaF3:Ln3+(Ln=CeTb), SmF3:Ln3+(Ln=CeTb), Zn(OH)F:Mn2+adopts simple hydrothermal method, we study the structure morphology and the influence of morphology and properties, when we change the reaction conditions finally we studied the luminescence properties of doping with rare earth ions. The result of X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscopy (TEM) showed that the preparation of rare-earth doped inorganic fluoride crystals have good crystallinity and uniform particle size good dispersion.With La2O3and NaBF4as reaction under hydrothermal conditions doping rare earth elements Ce3+Tb3+, the generated LaF3:Ln3+(Ln=Ce Tb) has a strong luminescence performance, the test results show that the average particle diameter of generated LaF3is about170nm, thickness of50nm, around the six-party double trustum of a pyramid shape monodisperse structure. LaF3luminescent material activated by Ce3+issued a very strong ultraviolet light. LaF3nanoparticles activated by Tb3+issued a very strong green light.With Sm2O3and NaBF4as reaction preparation of SmF3, by changing the water hot conditions we found that with the increase of pH, SmF3structure changed when the pH value is higher than4.5the structure of SmF3from orthogonal crystal system change to hexagonal system. Doping rare earth ions Ce3+Tb3+, SmF3with luminous performance, the emission of SmF3:Ce samples has the peak at375nm. Emission spectrum of SmF3:Tb are mainly composed of381nm green light to launch.With Zn(CH3COO)2、Mn(CH3COO)2and NaBF4as reaction, preparation Zn(OH)F: Mn2+crystal present rules of morphology and under the excitation of ultraviolet light it presented a red light with a wide band emission spectrum. With the increment of Mn2+doping Zn(OH)F:Mn2+emission intensity of crystal also increases. When the doping amount reached to3%the emission intensity is maximum.