Li_2ZnSiO_4∶Eu^(3+)红色荧光粉的制备及其发光性能  

Synthesis and Luminescence Properties of Li_2ZnSiO_4∶Eu^(3+) Red Phosphor

作　　者：何晓林[1] 杨定明[1] 胡文远[1] 廖其龙[1] 

机构地区：[1]西南科技大学,四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010

出　　处：《硅酸盐学报》2014年第3期309-313,共5页Journal of The Chinese Ceramic Society

基　　金：国家重点基础研究发展计划(973计划,2012CB722707);西南科技大学实验室开放基金项目(12xnkf13);西南科技大学大学生创新训练计划(12xjjx88)资助项目

摘　　要：采用溶胶-凝胶法合成了适合于近紫外激发的Li2ZnSiO4∶Eu3+红色荧光粉,用X射线衍射、红外光谱和荧光光谱对样品进行了结构及发光性能表征。结果表明:合成样品为四方晶相Li2ZnSiO4晶体。样品的激发光谱由O2--→Eu3+电荷迁移带和Eu3+的离子特征激发峰组成。在波长为395nm的紫外激发下样品发射红光,发射主峰位于613nm,对应于Eu3+离子的5 D0→7 F2跃迁。随着Eu3+掺杂量的增加,其发光强度先增加后减小,Eu3+的最佳摩尔掺量为3.5%。The Li2ZnSiO4 ：Eu3＋ red phosphors, which are suitable for nearly ultraviolet light excitation, were synthesized by a sol-gel method. The structure and luminescence properties of the Liz ZnSiO4 ：Eu3＋ were characterized by X-ray diffraction, in- frared spectroscopy and photoluminescence spectroscopy, respectively. The results show that the sample is a pure tetragonal phase of Li2 ZnSiO4 -＇Eu3＋. The excitation spectra of the sample consist of O2-→Eu3＋ charge transitions and Eu3＋ ion excitation peak. Under ultraviolet excitation at a wavelength of 395 nm, the sample has a red luminescence due to the transitionSDo→7F2 of Eu3＋ , and the maximum emission peak appears at 613 nm. The luminescence intensity firstly increases and then decreases with increasing the amount of Eu3＋-doped. The optimal mole content of Eu3＋ is 3.5%.

关 键 词：溶胶一凝胶法 硅酸锌锂 红色荧光粉 发光性能 

分 类 号：O482[理学—固体物理]