红色荧光粉CePO4-6LaPO4@4SiO2:Eu3+的发光特性
Luminescent Properties of a Red Phosphor CePO4-6LaPO4@4SiO2: Eu3+
作者单位E-mail
刘茹 内蒙古师范大学化学与环境科学学院, 呼和浩特 010022  
王喜贵 内蒙古师范大学化学与环境科学学院, 呼和浩特 010022 wangxg@imnu.edu.cn 
摘要: 采用溶胶凝胶-高温固相法制备CePO4-6LaPO4@4SiO2∶Eu3+荧光粉,通过XRD、TEM、EDS、IR以及激发光谱和发射光谱对荧光粉的结构和发光性能进行了表征。XRD和EDS结果证明了目标产物,其由晶态的LaPO4、CePO4和非晶态的SiO2构成;TEM图显示样品形貌为不规则形状,并且显示CePO4-6LaPO4@4SiO2∶Eu3+荧光粉形成核壳结构;HRTEM图可以清楚地看出晶格条纹的形成;IR谱图显示结果与XRD和EDS的分析结果一致;荧光光谱图显示:在466 nm激发下,CePO4-6LaPO4@4SiO2∶Eu3+荧光粉在615 nm处出现属于Eu3+5D07F2跃迁的强烈红光发射。
关键词: 磷酸盐  二氧化硅  稀土离子  荧光性能
基金项目: 国家自然科学基金(No.21261010)、内蒙古自治区自然科学基金(No.2015MS0227)、内蒙古自治区创新基金项目(No.S20171013506)和内蒙古师范大学创新基金项目(No.CXJJS17081)资助项目。
Abstract: CePO4-6LaPO4@xSiO2:Eu3+ phosphors were synthesized by sol-gel method and high temperature solid state method. The structure and luminescence property of the phosphors were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), energy dispersive spectra (EDS), infrared spectra (IR), excitation spectra and emission spectra. The results of XRD and EDS confirmed target product, which was made up of crystalline state LaPO4, CePO4 and amorphous state SiO2; TEM showed that the morphology of the sample was irregular and CePO4-6LaPO4@4SiO2:Eu3+ phosphor formed core-shell structure; HRTEM image clearly showed the formation of lattice fringes; IR study was consistent with the XRD and EDS study. The fluorescence spectra showed that under excitation with 466 nm, the CePO4-6LaPO4@xSiO2:Eu3+ phosphor gave a strongest red emission at the 615 nm that belongs to the 5D07F2 transition of Eu3+.
Keywords: phosphate  silicon dioxide  rare earth ion  luminescence property
投稿时间:2019-01-18 修订日期:2019-07-05
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刘茹,王喜贵.红色荧光粉CePO4-6LaPO4@4SiO2:Eu3+的发光特性[J].无机化学学报,2019,35(9):1659-1664.
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