稀土离子Ce,Eu掺杂氟化镁钾荧光粉的光谱性质  

Spectral Properties of Rare Earth Ions in KMgF_3:RE(RE=Ce,Eu)

作　　者：朱国贤[1] 谢木标[1] 李海莲[1] 邱发民[1] 

机构地区：[1]湛江师范学院化学科学与技术学院,物理化学研究所,广东湛江524048

出　　处：《广州化工》2013年第18期108-109,114,共3页GuangZhou Chemical Industry

基　　金：湛江师范学院博士启动基金(No:ZL.;104)

摘　　要：采用高温固相反应法合成了Eu^(2+),Ce^(3+)单掺和共掺KMgF_3。分析了样品的结构,结果表明,所合成的样品均为单相。测定了它们的激发和发射光谱,结果显示:在Eu^(2+)单掺KMgF_3中,发现峰值位于360nm附近的锐峰线发射;在KMgF_3双掺体系中,只能观察到Eu^(2+)的发射光谱,并且Eu^(2+)的发射强度随着Eu^(2+)的浓度增加而增强,说明在共掺体系中存在Ce^(3+)→Eu^(2+)能量传递过程。Phase -pure Ce -/Eu -doped and co- doped KMgF3 phosphors were synthesized by high -temperature solid - state reactions at 950 ℃ for 4 h and characterized by means of X - ray powder diffraction （XRD）. The excitation and emission spectra of the rare earth ions doped KMgF3 through solid state reaction at a high temperature was investigated. In the KMgF3： Eu2＋ sample, there was only one sharp line emission located at 360 nm arising from f-f （6p 7/2→8S 7/2） transition of Eu2＋ in the host lattice. In the co- doped Eu2＋ and Ce3＋ system, the emission peak of the Eu2＋ could only be observed and the emission intensity of Eu2＋ion gradually increased with the increase of Eu2＋ concentration, which indicated an efficient enera, v transfer from Ce3 ＋ to Eu2＋ in the host.

关 键 词：稀土离子 KMgF_3 光谱 能量传递 

分 类 号：O614.3[理学—无机化学]