发光学报, 2016, 37 (1): 1, 网络出版: 2016-03-22   

SrLiAl3N4:Eu2+红色荧光粉的制备与发光特性

Syntheis and Luminescence Properties of SrLiAl3N4: Eu2+ Red Phosphor
作者单位
1 河北大学 物理科学与技术学院, 河北 保定071002
2 河北大学 电子与信息工程学院, 河北 保定071002
3 河北利福光电技术有限公司, 河北 保定071002
摘要
使用高温固相法于还原气氛中合成了SrLiAl3N4: Eu2+荧光粉并研究了其晶体结构和发光性质。样品均可以被蓝光或紫外光有效激发发射红光。XRD和SEM图谱显示合成了单相SrLiAl3N4。粉体的激发光谱在200~600 nm波长范围内呈现出双峰宽带激发带, 在267 nm、474 nm处分别有一个激发峰。发射光谱仅有一个宽带发射峰, 峰值在654 nm处, 属于Eu2+离子的5d→4f特征跃迁。荧光粉发光强度与Eu2+离子掺杂摩尔分数之间的关系表明: 随着Eu2+离子掺杂摩尔分数的增加, 粉体发光强度先上升后下降, 最佳掺杂摩尔分数为0.4%, 继续增大Eu2+离子的掺杂量会发生浓度猝灭现象。所准备的SrLiAl3N4: Eu2+荧光粉具有较好的热稳定性和较高的量子效率。
Abstract
SrLiAl3N4: Eu2+ red-emitting phosphors were prepared in reducing atmosphere by high temperature solid-state reaction which could be effectively excited by ultraviolet and blue light. Luminescence properties and crystal structure of the phosphors were investigated. X-ray diffraction patterns and scanning electron microscopy image show that the sample is a pure phase of SrLiAl3N4. In the excitation spectrum (from 200 to 600 nm), there are two wide bands and peaks at 267 nm and 474 nm. The emission spectrum shows a wide band with a peak at 654 nm corresponding to the 5d→4f transition of Eu2+. The effect of the doping concentration of Eu2+ was investigated. The result shows that the luminescent intensity firstly increases and then decreases with the increasing of Eu2+ mole fraction, and the best doping mole fraction of Eu2+ is 0.4%. The concentration quenching will occur if Eu2+ continue to be doped. The phosphors have good thermal quenching properties and quantum efficiency.

杨志平, 方恒九, 李旋旋, 冉争瑞, 王天洋. SrLiAl3N4:Eu2+红色荧光粉的制备与发光特性[J]. 发光学报, 2016, 37(1): 1. YANG Zhi-ping, FANG Heng-jiu, LI Xuan-xuan, RAN Zheng-rui, WANG Tian-yang. Syntheis and Luminescence Properties of SrLiAl3N4: Eu2+ Red Phosphor[J]. Chinese Journal of Luminescence, 2016, 37(1): 1.

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