Eu^(3+)含量对掺Eu^(3+)铝酸锌荧光粉晶体结构和发光性能的影响  

Influence of Eu^(3+) Concentrations on the Structure and Luminescence Properties of ZnAl_2O_4:Eu^(3+) Phosphors

作　　者：耿延玲[1] 李超[1] 郭伟博[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2012年第4期334-336,共3页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：山东省自然科学基金项目(ZR2009FL007)

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。Eu3＋ doped zinc aluminate phosphors were prepared via an improved coprecipi- tation method. The powder products were characterized by X-ray diffraction （XRD） and photoluminescence （PL） measurements. XRD results showed that low Eu3＋ concentra- tions had little influence on the crystalline phase formation. When the doped concentra- tion 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 con- centrations. There existed concentration quenching in high concentrations from the re- port of PL measurements. Compared with that of the solid state reaction method, the quenching concentration of the improved coprecipitation was higher.

关 键 词：荧光粉 X射线衍射 浓度猝灭 发光性能 

分 类 号：O614.3[理学—无机化学]