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Over the years, it has not stopped the development and exploration of new light-emitting materials . Unique electronic structure of the rare earth ion doped rare earth luminescent materials with photochemical stability , long fluorescence lifetime , quantum yield , narrow emission spectra Stokes displacement and other unique advantages . Therefore , the lanthanide - doped luminescent materials have been the focus of people 's studies . Eu3, Tb3 are the most commonly used and most important activator in the red and green phosphors , the more people focus of research focus . This thesis for the preparation and a water - soluble europium, terbium doped transforms the luminescent material to some work , the main contents are summarized as follows : 1 in methanol as the reaction solvent, co-precipitation method , without using any surfactant , next , the obtained hydrophilicity of CaF2 : of Ln3 nanoparticles , these particles can be well dispersed in water , and the particle distribution is uniform , the average particle diameter of about 20nm, and no agglomeration occurred . This method is simple , reproducible , high yield, very suitable for mass production . 2 respectively with polyvinyl pyrrolidone (PVP) as a surface active agent , and citric acid , with a coprecipitation method and hydrothermal had hydrophilicity of CaF2 : of Ln3 nanoparticles , these particles can be well dispersed in water , and detailed studies its structure and fluorescent properties . 3. Usually spherical of CaF2 : Eu3 particles difficult to obtain , the paper through the catalytic hydrolysis of the TEOS was prepared monodispersed spherical SiO2 particles , and then in the other active agent , on its surface coated with a layer has fluorescent properties of CaF2 : Eu3 , so that prepared a spherical light - emitting materials , and save the rare earth elements . Hydrothermal synthesis of the Eu3 and PO43- ions codoped CaPxW1-xO4: Eu3 nanomaterials , XRD, TEM and fluorescence spectroscopy showed that the particles are typical scheelite structure ; morphology rod ; PO43 - incorporation of the ions can be effectively regulate the spectral intensity change PO43- ion doping concentration of different emission intensities of the fluorescent material can be obtained .
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