首页 | 本学科首页   官方微博 | 高级检索  
     检索      

Ca4Y6Si6O25:Eu2+绿色荧光粉的发光特性
引用本文:杨志平,闻建伟,刘玉峰,李立虎,杨艳民,周东站,马淑媛,于红伟.Ca4Y6Si6O25:Eu2+绿色荧光粉的发光特性[J].发光学报,2011,32(1):7-11.
作者姓名:杨志平  闻建伟  刘玉峰  李立虎  杨艳民  周东站  马淑媛  于红伟
作者单位:1. 河北大学 物理科学与技术学院, 河北 保定 071002; 2. 河北大学 电子信息工程学院, 河北 保定 071002
基金项目:国家自然科学基金(50902042); 河北省自然科学基金(F2009000217)资助项目
摘    要:采用高温固相法合成了Ca4 Y6Si6O25:Eu2+绿色荧光材料.通过X射线衍射分析得知,Ca4Y6Si6O25属于六方晶系,具有P63/m(176)空间点群结构.测定了Eu2+的激发光谱和发射光谱.Ca4Y6Si6O25:Eu2+的激发光谱为350~450 nm的宽带谱,这与近紫外光LED芯片相匹配.发射光谱是峰值...

关 键 词:发光  荧光粉  Ca4Y6Si6O25:Eu2+  白光LED
收稿时间:2010-04-15
修稿时间:2010-08-05

Luminescence Property of Ca4Y6Si6O25: Eu2+ Green Phosphor
YANG Zhi-ping,WEN Jian-wei,LIU Yu-feng,LI Li-hu,YANG Yan-min,ZHOU Dong-zhan,MA Shu-yuan,YU Hong-wei.Luminescence Property of Ca4Y6Si6O25: Eu2+ Green Phosphor[J].Chinese Journal of Luminescence,2011,32(1):7-11.
Authors:YANG Zhi-ping  WEN Jian-wei  LIU Yu-feng  LI Li-hu  YANG Yan-min  ZHOU Dong-zhan  MA Shu-yuan  YU Hong-wei
Institution:1. College of Physics Science and Technology, Hebei University, Baoding 071002, China; 2. College of Electronic and Informational Engineering, Hebei University, Baoding 071002, China
Abstract:Ca4Y6Si6O25 ∶ Eu2+ green phosphor was prepared by high temperature solid-state reaction. The XRD speetrum indicates that Ca4Y6Si6O25 has a hexagonal crystal structure with a space group of P63/m(176). The excitation and emission spectra of Ca4Y6Si6O25 ∶ Eu2+ were measured when the mole fraction of Eu2+ was 20%. Its excitation spectrum is a broad band, from 350 nm to 450 nm, which matches with near ultraviolet LED chip. The emission spectrum of Ca4Y6Si6O25 ∶ Eu2+ exhibits an asymmetry broad band with the peak center at 527 nm, and it is because that Eu2+ takes the place of Ca2+ and forms two different luminescence centers. The effect of Eu2+ concentration on Ca4(1-x)Y6Si6O25 ∶ 4xEu2+ intensity was also investigated. With the increase of Eu2+ concentration, the luminescence intensity of the green phosphor get to maximum and then decrease. The optimal mole fraction of Eu2+ is 20%(x=0.05). According to Dexter theory, concentration quenching can be attributed to quadrupole-quadrupole interaction.
Keywords:Ca4Y6Si6O25:Eu2+
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《发光学报》浏览原始摘要信息
点击此处可从《发光学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号