白光LED用(Y_xGd_(1-x))(P,W)O_4:Eu红色荧光粉的发光性能研究  

Luminescent Properties of( Y_xGd_(1- x))( P,W)O_4: Eu Red Phosphor for White LED

作　　者：李波[1,2] 王育华[2] 沈雷军[1] 王忠志[1] 高乐乐[1] 周永勃[1] 

机构地区：[1]包头稀土研究院,内蒙古包头014030 [2]兰州大学物理科学与技术学院,甘肃兰州730000

出　　处：《中国稀土学报》2015年第5期535-541,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51372105)资助

摘　　要：采用高温固相方法合成了(YxGd1-x)(P0.5W0.5)O4:Eu0.15粉末状发光材料,经X衍射分析结构发现,当Y3+/Gd3+≤3∶7时,样品主要由Gd2WO6相和Gd PO4相组成,当Y3+/Gd3+接近或等于1∶1时,合成的样品由Gd2WO6相、Gd PO4相和Gd0.5Y0.5PO4相三相组成,当Y3+/Gd3+≥7∶3时,合成的样品由Gd2WO6相与Gd0.5Y0.5PO4相组成。研究了样品在蓝光激发下的光谱性质,讨论了Y3+/Gd3+的掺杂对材料发光性能的影响,发现当Y3+/Gd3+=7∶3时,样品发光强度最高。在蓝光激发下,样品的发射光谱主峰在611.5 nm,对应于Eu3+的5D0→7F2电偶极跃迁。在添加助熔剂试验中发现,粉体中加入NH4NO3做助熔剂效果最好,其最佳掺入浓度为3%(质量分数)。（ YxGd1-x ） （ Po.5 W0.5 O4 ） ： Eu0.15^3＋ phosphor was synthesized by the high-temperature solid-state tech- nique. By X-ray diffraction analysis it was found that, when y3＋/Gd3＋ ≥ 3： 7, the sample mainly consisted of Gd2WO6 phase and GdPO4 phase. When y3＋/Gd3＋ closed to or equal to 1： 1, the synthesized sample consisted of Gd2WO6 phase, GdPQ phase and Gd0.5Y0.5PO4 phase. When y3＋/Gd3＋ ≥7：3, the sample consisted of Gd2WO6 phase and Gd0.5 Y0.5 PO4 phase. The spectrum property of sample under blue light excitation was studied, the influ- ence of y3＋/Gd3＋ doping on luminescence properties was discussed, and when y3＋/Gd3＋ = 7：3 , samples had the highest luminous intensity. Under blue light excitation, the emission spectrum peaks of sample in 611.5 nm, corre- sponding to the 5D0→7F2 electric dipole transition of Eu3＋. In the cosolvent experiment, NH4NO3 has the best sol- vent effect, 3% for the best concentration of doped.

关 键 词：钨酸盐 磷酸盐 白光LED 红色荧光粉 稀土 

分 类 号：O482.31[理学—固体物理]