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The sulfate ions modified YAG:Ce~(3+) phosphors were prepared by co-precipitation method and characterized by X-ray diffraction,transmission electron microscopy,and photoluminescence.Effects of sulfate ions on the photoluminescence(PL) property of the as-prepared YAG:Ce~(3+) phosphors were studied,with sodium dodecyl sulfate(SDS) being added to R~(3+)(Ce~(3+),Y~(3+),Al~(3+)) ions.Results indicated that pure YAG:Ce~(3+) phosphors with different ratios of sulfate ions could be easily obtained by calcining the as-synthesized precursor at 950 ℃ for 2 h,the YAG:Ce~(3+) phosphors with an optimal mass ratio of 3.5 wt.%SDS had the highest emission intensity and the best dispersion behavior,and the fluorescence decay of the as-obtained YAG:Ce~(3+) phosphors was related to the lattice defect,reabsorption and cross correlation.Furthermore,thermal quenching properties of the YAG:Ce~(3+) phosphors and the YAG:Ce~(3+) phosphors with 3.5 wt.%SDS were also discussed,indicating that the YAG:Ce~(3+) with SDS phosphors could have potential applications in the daylight LEDs or warm white LEDs.
The sulfate ions modified YAG: Ce ~ (3+) phosphors were prepared by co-precipitation method and characterized by X-ray diffraction, transmission electron microscopy, and photoluminescence. Effects of sulfate ions on the photoluminescence (PL) property of the as- (3+), Y ~ (3 +), Al ~ (3+), Ce (3+) phosphors were studied with sodium dodecyl sulfate ) ions.Results indicated that pure YAG: Ce ~ (3+) phosphors with different ratios of sulfate ions could be easily obtained by calcining the as-synthesized precursor at 950 ° C for 2 h, the YAG: Ce ~ (3+) phosphors with an optimal mass ratio of 3.5 wt.% SDS had the highest emission intensity and the best dispersion behavior, and the fluorescence decay of the as-obtained YAG: Ce ~ (3+) phosphors was related to the lattice defect, reabsorption and cross correlation.Furthermore, thermal quenching properties of the YAG: Ce ~ (3+) phosphors and the YAG: Ce ~ (3+) phosphors with 3.5 wt.% SDS were also discussed, indicating that the YAG: Ce ~ (3+) w ith SDS phosphors could have potential applications in the daylight LEDs or warm white LEDs.