Fabrication And Luminescence Properties Of Ions Of Rare-earth Activated Ba₃Y（PO₄）₃ Fluorescent Material

In this paper, a series of phosphors based on Ba₃Y（PO₄）₃ were fabricated by high temperate solid stated method, which were used for near-ultraviolet LED. Explored the spectral properties and the concentration on the emission spectrum and some other luminescent properties of phosphors doped with different rare earth ions explored activator(Eu²⁺, Tb³⁺, Eu³⁺ and Dy³⁺), as follows:（1） The phosphors of Ba₃Y（PO₄）₃:Eu²⁺ were manufactured by high temperate solid stated reaction. The phosphorescent properties of the material were discussed. May be there were two luminescent centers the Eu²⁺（Ⅰ） and the Eu²⁺（Ⅱ） in the formation of Ba₃Y（PO₄）₃ doped with Eu²⁺. The Eu²⁺（Ⅰ） emission blue light of 424 nm, and the Eu²⁺（Ⅱ） emission green light of 516 nm.The relationship between the emission spectrum and the concentration of Eu²⁺ were discussed.（2） The green phosphors Ba₃Y（PO₄）₃:Tb³⁺ were manufactured by high temperate solid stated reaction. The emission peaks of the phosphors consisted of the blue light area at 417 nm and 440 nm, green light area at 492 nm, 552 nm, 586 nm and 625 nm. The effects of emission with the doping intensity of Tb³⁺ were studied, the concentration of Tb³⁺ increased, the emission luminescent properties enhanced, concentration quenching did not occur.（3） The orange-red phosphors Ba₃Y（PO₄）₃:Eu³⁺ were manufactured by high temperate solid stated reaction. The most powerful excitation peak was at 395 nm, corresponding to the Eu^{3+ 7}F₀â†'⁵L₆ Energy transition. At the excitation of 395 nm, the emission spectrum of the sample is the typical ⁵Dâ†'⁷F transition emission of Eu³⁺. The impact of the luminescence with the number of luminescent centers was studied. We found that with the luminescent centers’(Eu³⁺) concentration increased, the brightness was strengthened, concentration quenching did not occur.（4） Series of Ba₃Y（PO₄）₃:Dy³⁺,Ce³⁺ phosphors were manufactured by high temperate solid stated reaction, the influence of the phosphorescent properties of doping concentration of Dy³⁺ was studied. When the doping concentration x = 0.08, the phenomenon of concentration quenching occurred, the concentration quenching due to dipole- dipole interactions. The color of the phosphors emits light coordinate the white area while with a different doping concentrations of Dy³⁺, they were ideal white phosphors who’s Y/B values did not change significantly with the concentration of Dy³⁺. At the same time, the affect of the sensitizer Ce³⁺ to the luminescence intensity of Ba₃Y（PO₄）₃:Dy³⁺ were studied.