Sr_5SiO_4Cl_6∶Eu^(2+)蓝白色荧光粉的发光特性研究  

Luminescent Properties of Eu^(2+)-Doped Sr_5SiO_4Cl_6 Blue-White Phosphor

作　　者：杨志平[1] 杨广伟[1] 王少丽[1] 田晶[2] 李盼来[1] 李旭[1] 

机构地区：[1]河北大学物理科学与技术学院 [2]河北大学电子信息工程学院,河北保定071002

出　　处：《中国稀土学报》2007年第6期668-671,共4页Journal of the Chinese Society of Rare Earths

基　　金：河北科学技术发展项目(51215103b)

摘　　要：采用高温固相法合成了Sr5SiO4Cl6∶Eu2+荧光粉。该荧光粉在近紫外360 nm激发下,出现了峰值位于454 nm稍不对称的发射峰,对其进行Gaussian曲线拟合,分解得到了451和470 nm两个明显的发射峰。利用Van Uitert公式讨论了晶格环境对Eu2+发光中心能量状态的影响,得出451和470 nm发射峰为Eu2+分别占据九配位和八配位的Sr2+格位跃迁产生的。研究了烧结温度以及Eu2+含量对荧光粉发光强度的影响。The Sr5SiO4Cl6 ： Eu^2＋ blue-white phosphor was synthesized by high temperature solid state reaction. The phosphor excitated by 360 nm light showed one unsymmetric peak at 454 nm. The emission spectra can be separated into two distinct peaks located at 451 and 470 nm, respectively. According to the Van Uitert experimental equation and the data of the spectra, it was shown that the coordination numbers of Eu^2＋ in Sr5SiO4Cl6 are eight and nine corresponding to the two emission peaks. The influence of different sintering temperatures and concentration of Eu^2＋ on the emission intensity were also investigated.

关 键 词：LED 荧光粉 EU^2+ Sr5SiO4Cl6 发光 稀土 

分 类 号：O482.31[理学—固体物理]