Ce3+,Tb3+ co-doped YPO4 down-conversion phosphors and Er3+,Tm3+,Yb3 + co-doped YPO4 up-conversion phosphors were synthesized by using hydrothermal method.Uniform-sized (～ 1 tum) luminescence materials were gained through process optimization.A series of experiments were carried to study the effect of reaction temperature,time,annealing temperature and doping ratio of rare-earth ions on luminescence properties.The down-conversion luminescence nano-material YPO4∶ Ce3+,1％ Tb3+ emits strong green light excited by 295 nm ultraviolet light,and the up-conversion nano-material YPO4∶ 3％ Er3+,Tm3+,Yb3+ emits warm white light excited by 980 nm infrared light,respectively.%利用水热法分别合成了Ce3+、Tb3共掺杂的YPO4下转换荧光粉和Er3+、Yb3+、Tm3共掺杂的YPO4上转换荧光粉,经过工艺优化获得了1μm左右尺寸均匀的发光材料.通过系列实验研究了反应温度、反应时间、稀土离子掺杂比例和退火温度对样品发光性能的影响.YPO4∶Ce3+,Tb3+荧光粉在295 nm紫外光的激发下产生下转换发光效应,当Tb3+摩尔分数为1％时得到明亮的绿光;YPO4∶Er3+,Tm3+,Yb3荧光粉在980nm近红外光激发下产生上转换发光效应,当稀土离子中Er3+摩尔分数为3％时,所制备的样品经过1 000℃退火处理后发出很强的暖白光.
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