Fe^(3+)、Ce^(3+)共掺杂γ-LiAlO_2的发光性质(英文)  

Luminescence Properties of Fe^(3+) and Ce^(3+) Co-doped γ-LiAlO_2

作　　者：强人峰[1,2] 肖思国[1,2] 阳效良[1,2] 丁建文[1,2] 朱楚桥[1,2] 

机构地区：[1]湘潭大学材料与光电物理学院湘潭大学现代物理研究所,湖南湘潭411105 [2]湘潭大学低维材料及其应用技术教育部重点实验室,湖南湘潭411105

出　　处：《发光学报》2009年第1期7-11,共5页Chinese Journal of Luminescence

基　　金：Project supported by National Natural Science Foundation of China(10674113,10847103);Program for New Century Excellent Talents in University(NCET-06-0707);Hunan Provincial Natural Science Foundation of China (06JJ50006);Scientific Research Fund of Hunan Provincial Education Department(06A071,07B073);Partially supported by the Open Project Program of Low Dimensional Materials & Application Technology (Xiangtan University) of Ministry of Education of China (KF0713)~~

摘　　要：采用不同于传统固相反应法的制备方法合成了Fe,Ce共掺杂γ-LiAlO2。通过XRD和SEM分析表明,采用这种方法能够成功获得尺寸小于10μm的四方相结构γ-LiAlO2荧光粉。从γ-LiAlO2:Fe,Ce的激发和发射光谱可以看出,通过引入少量的铈离子,我们首先发现了铈离子掺杂对样品的发光效率有明显的影响。并且随着铈离子浓度的增加,其发光效率也出现规律性的变化,而且发射光谱在Ce离子摩尔分数达到1.5%的情况下发光效率最强,当Ce离子摩尔分数达到3%时,发光效率明显下降。这种高效的荧光粉作为转光剂应用于人工植物照明和农用转光膜具有积极的意义。Fe^3＋, Ce^3＋ co-doped LiAlO2 samples were successfully prepared by solid-state reaction method. The XRD and the SEM results showed that tetragonal γ-LiAlO2 with diameter less than 10 μm was obtained. It was found firstly that the luminescence intensity of γ-LiAlO2： Fe^3 ＋ is enhanced greatly by introducing a small amount of Ce^3＋ ions. The Ce^3 ＋ plays a role as sensitizer in host lattice, resulting in the enhancement of deep red emission of Fe^3＋ ions. The improved phosphor might be widely applied to agricultural film and fluorescent lamps relating to plant growth.

关 键 词：荧光体 发光 效率 共掺杂 

分 类 号：O482.31[理学—固体物理]