全文下载：2012040334
耿延玲， 李超， 郭伟博
（青岛科技大学 化学与分子工程学院，山东 青岛 266042）
摘要： 采用改进的共沉淀法合成掺Eu3+铝酸锌荧光粉。对产物进行X射线衍射和发光性能分析。X射线衍射分析结果表明，在Eu3+掺杂质量分数低于5%时，掺Eu3+铝酸锌的结晶质量高；但当Eu3+掺杂质量分数高于5%时，会导致晶体结构缺陷的数目增加，从而引起结晶质量下降。不同掺杂浓度的荧光粉的发射光谱显示，当掺杂质量分数高于5%时，会出现浓度猝灭现象。与固相反应法相比，共沉淀法的猝灭浓度有明显提高。
关键词: 荧光粉； X射线衍射； 浓度猝灭； 发光性能
中图分类号：O 614.3 文献标志码： A
收稿日期：2011-12-23
基金项目： 山东省自然科学基金项目（ZR2009FL007）.
作者简介： 耿延玲（1975—），女，讲师.
Influence of Eu3+ Concentrations on the Structure and
Luminescence Properties of ZnAl2O4:Eu3+ Phosphors
GENG Yan-ling, LI Chao, GUO Wei-bo
(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 26604， China)
Abstract: Eu3+ doped zinc aluminate phosphors were prepared via an improved coprecipitation method. The powder products were characterized by X-ray diffraction (XRD) and photoluminescence (PL) measurements. XRD results showed that low Eu3+ concentrations had little influence on the crystalline phase formation. When the doped concentration was higher than 5%, the intensities of peaks decreased with the rise of Eu3+ doped concentrations. That is because the crystal defect grows with the increase of doped concentrations. There existed concentration quenching in high concentrations from the report of PL measurements. Compared with that of the solid state reaction method, the quenching concentration of the improved coprecipitation was higher.
Key words: phosphor; XRD; concentration quenching; luminescence properties
