一种新型白光荧光粉Sr_(1.5)Ca_(0.5)SiO_4∶Eu^(3＋),Tb^(3＋),Eu^(2＋)的合成与光致发光(英文)  

Preparation and Photoluminescence of a Novel White-Emitting Phosphor Sr_(1.5)Ca_(0.5)SiO_4∶Eu^(3+),Tb^(3+),Eu^(2+)

作　　者：陈茜[1] 赵君风[1] 余丽萍[1] 荣春英[1] 李承志[1] 廉世勋[1] 

机构地区：[1]化学生物学和中药研究教育部重点实验室湖南师范大学化学化工学院,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2011年第3期46-48,共3页Journal of Natural Science of Hunan Normal University

基　　金：supported by NSFC(Grant Nos.20971042,50772035);the Science and Technology Office of Education Department of Hunan Province(No.10A070)~~

摘　　要：采用高温固相法合成了名义组成为Sr1.5Ca0.5SiO4∶0.01 Eu3+,nTb3+(n=3.0×10-4,7.0×10-4,1.5×10-3mol)的荧光粉.X射线衍射测试表明荧光粉样品为单一物相.在紫外光(394 nm)激发下,样品同时产生蓝光、绿光和红橙光发射,分别对应于Eu2+离子的5d→4f,Tb3+离子的5D4→7FJ和Eu3+离子的5D0→7FJ跃迁,表明部分Eu3+离子在还原气氛下被还原成Eu2+.红光、绿光和蓝光发射强度相当,复合得到白光.色坐标(CIE)计算结果显示,荧光粉Sr1.5Ca0.5SiO4∶0.01 Eu3+,7.0×10-4Tb3+的白色发光(CIE:x=0.321,y=0.322)接近纯白色(CIE:x=0.33,y=0.33),表明它是一种很有应用前景的基于紫外光芯片的单基白光荧光粉.A series of the nominal composition Sr1.5Ca0.5SiO4∶0.01 Eu3＋,nTb3＋（n=3.0×10-4,7.0×10-4,1.5×10-3 mol）phosphors with single phase was synthesized by high temperature solid-state reaction.Upon the excitation by near-UV light（394 nm）,the phosphors give blue,green and orange-red emissions which are originated from Eu2＋ 5d→ 4f,Tb3＋ 5D4→7FJ and Eu3＋ 5D0→7FJ transitions,respectively,with comparable intensities,resulting in white light emission.The results of CIE calculation show that the Sr1.5Ca0.5SiO4∶0.01 Eu3＋,7.0×10-4 Tb3＋ phosphor can provide white emission（x=0.321,y=0.322） very close to the standard white（x=0.33,y=0.33）,indicating it is a potential single-phased white phosphor for LED-based UV-chip.

关 键 词：Sr1.5Ca0.5SiO4 白光发射荧光粉 发光二极管 

分 类 号：O482.3[理学—固体物理]