Synthesis And Property Analysis Of Rare Earth Ions Doped Phosphate Phosphor

In this paper. some kinds of phosphate phosphor used for UVLED were fabricated by traditional high temperate solid stated method. Compared with Joint Committee on Powder Diffraction Standards. the crystal structure of the phosphors were studied. The excitation and emission spectra of the phosphors were investigated. and the luminescent mechanism of the phosphors were also analysed. The chief contents are given a s follows:(1) The BaZnP2O7:Tb3+ phosphor was prepared. The excitation spectrum contains a broad band extending from 350 to 400 nm. which is coupled well with the emission of UVLED. The effects of co-doped Ce3- concentration on the emission intensity are also investigated.(2) A novel blue-emitting phosphor NaBaPO4:Eu2+ was prepared. The main excitation peak is located at 378 nm. which matches the emission of UVLED(350-410 nm). The effect of doped Eu2+ concentration on the emission intensity was also investigated.(3) The NaBaPO4:Eu3+ phosphor was prepared. It could be seen from its luminescent properties that this phosphor could be excited effectively by blue chip and UV chip and emited pure red light. So it can be used for the red phosphor in the white LED that composed by UV chip and multi color phosphors and the compensating phosphor in "blue +yellow" model. The role of charge compensation of Li+. K+ and Cl- to the emission intensity was studied. It was found that Li+ gave the best improvement to enhance the intensity of the emissions.(4) The KCaPO4:Eu2+ phosphor appeared one anisomerous peak under near-ultraviolet (UV) excitation and the Gaussian fit of the PL spectrum with two emission bands at 480 nm and 540 nm were observed. Eu2- ions doped in two different Ca2+ sites:Eu(â… ) and Eu(â…¡) in the host lattice, respectively.