新型蓝绿色稀土荧光粉SrZnO_2:Pr^(3+)的发光性能  

Luminescence Properties of Novel Blue-green-emitting Rare-earth SrZnO_2:Pr^(3+) Phosphor

作　　者：贺香红[1] 周健[1] 毕承路[1] 李卫华[1] 

机构地区：[1]江苏技术师范学院化学化工学院江苏省贵金属深加工技术及应用重点建设实验室,常州213001

出　　处：《人工晶体学报》2007年第6期1408-1411,1407,共5页Journal of Synthetic Crystals

基　　金：江苏高校高新技术产业发展基金(JHB05-52)

摘　　要：运用柠檬酸溶胶-凝胶法合成了SrZnO2:Pr3+和SrZnO2:Pr3+,M+(M=Li,Na,K)系列新型蓝绿色稀土荧光粉。用X射线粉末衍射(XRD)、荧光光谱(PL)、拉曼光谱(Raman)等手段研究了样品的物相结构和光致发光性能。SrZnO2:Pr3+荧光体的激发光谱是一个主峰位于262nm处的宽带谱。其发射主峰位于490nm附近,样品在紫外光照射下发出蓝绿色荧光。SrZnO2:Pr3+荧光体的猝灭浓度为0.1mol%。在该荧光体中共掺碱金属离子Li+,Na+,K+,能增大样品的激发和发射强度。A series of novel rare-earth luminescent materials, SrZnO2 ： Pra^3＋ and SrZnO2 ： Pra^3＋ , M^＋ （ M = Li, Na, K） , were synthesized by citrate Sol-gel method. The structure and luminescence properties of asprepared samples were studied through XRD, photoluminescence and Raman spectrum, respectively. The excitation spectrum shows a broad intense band peaked at about 262nm ranging from 200-300nm, which is ascribed to 4f ^2→4f5d transition. The emission spectrum of the phosphor is composed of four bands, which located at 490,538,622 and 657nm originating from ^3p0→^3HJ （J = 4,5,6 ）, 3F2 transition. Under excitation of UV, the samples emitted blue-green fluorescence. The quenching concentration was found to be about 0. 1 mol% relative to SrZnO2 host. The luminescence intensity of SrZnO2 ：Pr^3＋ phosphor can be significantly enhanced by co-doped with alkali metal ions Li^＋ , Na ^＋ or K^＋ ions, especially for Li ^＋ ion. Key words： SrZnO2 ： Pr^3＋ blue-green-emitting phosphor; Pr^3＋ ion; photoluminescence properties ; citrate Sol-gel method

关 键 词：SrZnO2:Pr^3+蓝绿色荧光粉 镨离子 发光性能 柠檬酸溶胶-凝胶法 

分 类 号：O614[理学—无机化学]