CaF2包覆Zn2SiO4：Mn^2＋绿色荧光粉的发光性能研究  

Luminescent Characterization of CaF_2-Coated Zn_2SiO_4:Mn^(2+) Phosphors

作　　者：李峰[1] 梅桢[1] 张卫华[1] 杨彬亚 杨溦 席增卫 王伍宝 

机构地区：[1]西安理工大学,材料科学与工程学院,陕西西安710048 [2]陕西彩虹荧光材料有限公司,陕西咸阳712021

出　　处：《西安理工大学学报》2013年第1期61-65,共5页Journal of Xi'an University of Technology

基　　金：陕西省教育厅科学技术研究计划基金资助项目(11JK0825);陕西省科学技术研究发展计划基金资助项目(2011JQ6005)

摘　　要：采用溶胶-凝胶法在Zn2SiO4:Mn2+荧光粉颗粒表面包覆一层CaF2薄膜,研究CaF2膜对Zn2SiO4:Mn2+荧光粉的表面形貌以及发光性能的影响。利用扫描电子显微镜、XPS光电子能谱仪、荧光光度计分析包膜荧光粉的表面形貌、成分、紫外发射特性,并在模拟的等离子显示器工作条件下测试材料的真空紫外特性,与未包覆的Zn2SiO4:Mn2+荧光粉的各项性能进行比较。结果表明,CaF2在Zn2SiO4:Mn2+荧光粉表面呈细小颗粒状弥散分布,包覆后的荧光粉的亮度得到了明显的提高,余辉时间没有改变,色坐标未发生较大漂移,此结论对于改善PDP的显示性能及降低其成本均具有重要意义。CaF2 is coated on the surface of Zn2SiO4：Mn^2＋ phosphor particles by a sol-gel method.Luminescent characterization of CaF2-coated Zn2SiO4：Mn2＋ phosphors are investigated.The morphology and surface composition of Zn2SiO4：Mn^2＋ phosphors are measured by scanning electron microscope and X-ray Photoeletron Spectroscopy,and the ultraviolet emission spectra of Zn2SiO4：Mn^2＋ phosphors are obtained by a fluorescence spectrometer,the relative brightness,the decay time and the color coordinate under VUV conditions are measured by the simulated plasma display conditions.The results show that the CaF2 as granular grains distribute and disperse on the surface of Zn2SiO4：Mn2＋,the relative brightness is significantly improved.Moreover,the decay time is kept to be 6 ms and the color coordinate are nearly unchanged as well,accordingly,this conclusion is of great significance for improving PDP function and reducing costs.

关 键 词：溶胶-凝胶法 Zn2SiO4 MN^2+ 包覆 氟化钙 亮度 色坐标 

分 类 号：O482.31[理学—固体物理]