橙红色荧光粉Ca_3Y_2(Si_3O_9)_2:Eu^(3+)的制备及发光性能  

Preparation and Luminescence Properties of Orange-red Phosphors Ca_3Y_2(Si_3O_9)_2:Eu^(3+)

作　　者：杨志平[1] 梁晓双 赵引红[1] 侯春彩[1] 王灿[1] 董宏岩[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《硅酸盐学报》2013年第12期1720-1724,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51202053);河北省自然科学基金(Q2012061)资助项目

摘　　要：采用高温固相法合成了Ca3Y2-2x(Si3O9)2:2xEu3+系列荧光粉,并表征了材料的发光特性。X射线衍射谱表明,得到的样品为纯相的Ca3Y2(Si3O9)2晶体。样品的激发光谱主要来源于较强的O2–-Eu3+电荷迁移带和相对较弱的Eu3+的f-f跃迁吸收。样品在紫外光、近紫外光激发下发射橙红光。以225 nm作为激发源时,样品的发射主峰位于587和610 nm,分别对应于Eu3+的5D0→7FJ(J=1,2)跃迁,且二者强度比较接近;而以392 nm作为激发源时,样品的615 nm主峰较强,而591 nm较弱。通过时间分辨光谱测得Eu3+的5D0能级的荧光寿命。随着Eu3+掺杂量的增大,样品发光逐渐增强,在所进行的实验范围之内,并未发生浓度猝灭效应。A series of orange-red phosphors Ca3Y2-2x（Si3O9）2：2xEu^3＋ photoluminescence properties were investigated by X-ray diffraction. were synthesized by a conventional solid-state reaction. Their The results show that the prepared Ca3Y2（Si3O9）2：Eu^3＋ crystals are Ca3Y2（Si3O9）2 phase. There are two excitation bands, namely, the O^2- -Eu^3＋ intensive charge transition band （CTB） and the weakf- ftransition absorption of Eu^3＋ in the excitation spectra. The main emissions are located at 587 and 610 nm under the excitation of 225 rim, respectively, corresponding to ^5D0→^7F1 and ^5D0→^7F2 transition, and the intensity of the former is similar to that of the latter. However, the intensive emission is located at 615 nm and the weak emission is located at 591 nm under the excitation of 392 nm. The decay time of ^5D0 level in Eu^3＋ was determined via the time resolved spectra. The effect of Eu^3＋ content on the emission spectra inten- sity of Ca3Y2（Si3O9）2：Eu^3＋ was investigated. The luminescent intensity increases with increasing Eu^3＋ content. The concentration quenching does not occur.

关 键 词：硅酸钇钙 铕掺杂 橙红色 荧光粉 发光性能 

分 类 号：O482.31[理学—固体物理]