Preparation And Luminescence Properties Study Of The Novel Fluroide Phosphate Based LED Phosphor

White LED, as the novel generation of green lighting energy, shows the tremendous the prospect of application and the value of researching in terms of lighting, building back light,display area and medical light and so on with the advantages of energy conservation and environmental protection, long life and small in size etc. Phosphor method as the mainstream plan to make white LED come true in recently, has the advantages like low costing, high manufacturability compare with other projects. But, it is lack of phosphor with high luminous efficiency and excited by ultraviolet light or blue light LED chips, so that exploring and researching novel white LED phosphor has been current topics of luminescent material field and most important purpose. The academic dissertation mainly takes fluoride phosphate system（Ba₄Gd₃Na₃（PO₄）₆F₂） as researching project, and the lighting ions like Eu²⁺, Ce³⁺, Tb³⁺, Mn²⁺ as doping ions. The novel fluoride phosphate phosphors excited by ultraviolet light has been designed and manufactured finally, through picking over host materials and controlling concentration about doping ions, utilizing the energy transfer of different doping ions, to emitting light colors and chromaticity is adjustable, so this subject selected has enrich the basic research of phosphor. It had been successfully synthesized and characterized fluoride phosphate phosphors of apatite-type structure with high temperature solid state method in this article, and analyzed its crystal structure, photoluminescence spectra, the energy transfer and quantum efficiency of lighting ions, the colorimetric in detail. It mainly got such few achievements like below.It had been successfully synthesized a single substrate fluorescent material Ba₄Gd₃Na₃（PO₄）₆F₂: Eu²⁺ with high temperature solid state method. Analyzing the crystal structure of host Ba₄Gd₃Na₃（PO₄）₆F₂, and taking the Rietveld refinement to fluorescent material,the results of the Rietveld refinement indicated that the crystal belongs to apatite-type structure system. Then, luminescence properties of Eu²⁺ and the energy transfer phenomenon between Eu²⁺-Eu²⁺ had been researched in detail. Making tunable yellow-green light color come true by changing the Eu²⁺ concentration, and confirming optimal concentration of Eu²⁺ x = 4mol%.It had been successfully synthesized a single substrate fluorescent material of apatite-type structure Ba₄Gd₃Na₃（PO₄）₆F₂: Ce³⁺,Tb³⁺,Mn²⁺ with high temperature solid state method. In the article luminous performance of Ce³⁺, Tb³⁺, Mn²⁺ and the energy transfer phenomenon between Ce³⁺-Tb³⁺, Ce³⁺-Mn²⁺ had been researched in detail. The CIE chromaticity diagram was controlled by the energy transfer phenomenon, through researching for its luminescenceproperties and the energy transfer phenomenon. Making tunable yellow-green-blue light color come true of a single substrate fluorescent material Ba₄Gd₃Na₃（PO₄）₆F₂: Ce³⁺,Tb³⁺,Mn²⁺ by changing the Ce³⁺, Tb³⁺, Mn²⁺ concentration x = 2mol%, y = 36mol%, z = 9mol%, and confirming optimal concentration of the Ce³⁺, Tb³⁺, Mn²⁺ doping concentration.