白光用红色荧光粉Gd_2SrAl_2O_7:Eu^(3+)的合成及发光性能研究  

Synthesis and Luminescent Properties of Red Phosphor Gd_2SrAl_2O_7: Eu^(3+) for White LED Application

作　　者：孙晓慧[1] 张修丽[1] 朱鹏飞[1] 张朝民[1] 吴建宝[1] 杭寅[2] 

机构地区：[1]上海工程技术大学基础学院,上海2016202 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《中国稀土学报》2014年第3期270-274,共5页Journal of the Chinese Society of Rare Earths

基　　金：上海市自然科学基金面上项目(13ZR1418200)资助

摘　　要：用传统的固态反应法合成了新型红色Eu3+掺杂的Gd2SrAl2O7红色荧光粉。通过添加Li2CO3助熔剂,有效地降低了反应温度,获得了纯Gd2SrAl2O7相。用X射线衍射仪分析确认了产物为Gd2SrAl2O7晶相,并用光谱仪测试了光谱性能,发现当Eu3+掺杂浓度为30%时,荧光粉在623 nm处有最强发光,是Y2O3:Eu3+的两倍。(Gd0.7Eu0.3)2SrAl2O7(x=0.650,y=0.349)色度值与美国国家电视标准委员会标准值(x=0.670,y=0.330)接近。A novel red phosphor of Eu^3＋doped Gd2SrAl2O7was successfully synthesized by the conventional solid state reaction method. Li2CO3was employed as the flux to decrease the reaction temperature,and pure Gd2SrAl2O7 phases were obtained. X-ray diffraction patterns confirmed it was Gd2SrAl2O7phase. The optical properties were analyzed and it was found that the doping content reached 30%,the phosphor had the maximal emission intensity at 623 nm,which was about two times higher than that of Y2O3： Eu^3＋. The chromaticity coordinates of（ Gd0. 7 Eu0. 3）2SrAl2O7（ x =0. 650,y =0. 349） were close to the standard of National Television Standard Committee（ NTSC） values（ x = 0. 670,y = 0. 330）.

关 键 词：红色荧光粉 固态反应 发光性能 稀土 

分 类 号：O482.31[理学—固体物理] O483[理学—物理]