钡取代锶对Sr3Al0.6Si0.4O4.4F0.6：Ce^3＋荧光粉的发光性能影响  

Influence of Barium for Strontium Substitution on Luminescence Properties of Sr_3Al_(0.6)Si_(0.4)O_(4.4)F_(0.6):Ce^(3+) Phosphors

作　　者：马小乐[1] 庄卫东[1] 刘荣辉[1] 刘元红[1] 陈磊[1] 陈观通[1] 

机构地区：[1]北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京100088

出　　处：《中国稀土学报》2017年第5期571-578,共8页Journal of the Chinese Society of Rare Earths

基　　金：科技部国家重点研发计划(2016YFB0400600,2016YFB0400605);973计划(2014CB643801)资助

摘　　要：采用高温固相法合成Ba取代Sr_3Al_(0.6)Si_(0.4)O_(4.4)F_(0.6):Ce^(3+)中Sr的氟氧铝硅酸锶钡(Sr_(3-x)Ba_xAl_(0.6)Si_(0.4)O_(4.4)F_(0.6):Ce^(3+))荧光粉。指出Ba/Sr固溶极限为x=0.9。由于Sr_3Al_(0.6)Si_(0.4)O_(4.4)F_(0.6):Ce^(3+)中Sr具有十配位Sr(1)和八配位的Sr(2),所以激活剂离子Ce^(3+)也具有两个不同的占位,通过Ce^(3+)的光谱结果,指出是由于Ba的掺入诱导Ce(1)^(3+)发光中心增加,减少了Ce(2)^(3+)发光中心,从而出现随着Ba/Sr比增加,粉样在400 nm激发下发光强度减小,而在460 nm激发下发光强度增强的现象。因此Sr_(3-x)Ba_xAl_(0.6)Si_(0.4)O_(4.4)F_(0.6):Ce^(3+)荧光粉是一款潜在的适合近蓝光激发的白光LED用荧光粉。Sr（3-x）BaxAl（0.6）Si（0.4）O（4.4）F（0.6）：Ce^3＋phosphors were synthesized by high temperature solid state method. It was found that the limit value of Ba^（2＋） incorporation is x = 0. 9. Ce^3＋ ions had two different occupying sites due to Sr atom had two different coordination environments with 10-coordination（ Sr1） and 8-coordination（ Sr2）. According to the spectral results of Ce3 ＋,it was pointed out that Ba incorporation induced Ce（ 1）3 ＋luminescence center increasing,Ce（ 2）^3＋ luminescence centers decreasing,which led to the decrease of emission intensity excited at400 nm and the enhancement of emission intensity under 460 nm excitation. Therefore,Sr（3-x）BaxAl（0.6）Si（0.4）O（4.4）F（0.6）：Ce^3＋phosphor is a potential white LED-used phosphor suitable for near blue light excitation.

关 键 词：荧光粉 Sr3-xBaxAl0.6Si0.4O4.4F0.6:Ce3+ 猝灭浓度 

分 类 号：O482.31[理学—固体物理] O614.33[理学—物理]