Preparation And Luminescence Properties Of Rare Earth Doped Red Emitting Materials

In this paper,a series of phosphate glasses were prepared,and phosphate glass samples with different lithium niobate doping concentrations and different heat treatment times were prepared and their properties were studied.The optical and electrical properties of the low-temperature sintered nitride phosphor/low-melting glass powder composite material were studied by SEM,fluorescence spectroscopy,photoelectric testing and other characterization methods.The properties of Y₂Ca₂Ga_3-xVO₁₂:x Pr³⁺（x=0,0.03,0.06,0.09,0.12）phosphors and Y₂Ca₂Ga_3-yVO₁₂:y Ho³⁺（y=0,0.03,0.06,0.09,0.12）phosphors were studied.The main research contents of this paper are as follows:1)ZP series phosphate samples were prepared,the composition（molar ratio）of the sam ples was 40Zn O-40P₂O₅-x(10Li₂O-10Nb₂O_5-0.01Pr³⁺)（x=0.0,0.4,0.8,1.0,1.2,1.4,1.6,1.8,2.0）.As the value of x increases,the fluorescence characteristics change accordingly,and the fluorescence lifetime also changes accordingly.2)CaAlSiN₃:Eu²⁺luminescent glass and（Sr,Ca）Al Si N₃:Eu²⁺luminescent glass were prepared.CaAlSiN₃:Eu²⁺luminescent glass maximum internal IQE=72.4%,maximum luminous flux is 44 lm;maximum lumen efficiency is 88 lm/W;150 ^oC,CASN luminescent glass luminous intensity is about 98%,with excellent thermal stability.（Sr,Ca）Al Si N₃:Eu²⁺luminescent glass at 150℃,its luminous intensity is about 89%of room temperature,this value is higher than general oxynitride;（Sr,Ca）Al Si N₃:Eu²⁺luminescent glass SEM shows:the phosphor powder and the glass matrix are evenly mixed.3)The phosphors of Y₂Ca₂Ga_3-xVO₁₂:x Pr³⁺（x=0,0.03,0.06,0.09,0.12）and Y₂Ca₂Ga_3-yVO₁₂:y Ho³⁺（y=0,0.03,0.06,0.09,0.12）were also prepared.The results show that the emission wavelength position of Y₂Ca₂Ga_3-xVO₁₂:x Pr³⁺（x=0,0.03,0.06,0.09,0.12）phosphor is in the band range of 600-800 nm,and Y₂Ca₂Ga_3-yVO₁₂:y Ho³⁺（y=0,0.03,0.06,0.09,0.12）phosphors in the 492-577 nm band range.The XRD phase of the two series of phosphors is relatively pure,and the number of other unknown diffraction peaks is less.The IR spectra of two series phosphors,Y₂Ca₂Ga_3-yVO₁₂:y Ho³⁺（y=0,0.03,0.06,0.09,0.12）did not change with the change of Ho³⁺doping concentration;The IR spectra of Y₂Ca₂Ga_3-xVO₁₂:x Pr³⁺（x=0,0.03,0.06,0.09,0.12）phosphors vary with the doping concentration of Pr³⁺ions.