Roles of crystal defects in the persistent luminescence of EU2+, Dy3+ co-doped strontium aluminate based phosphors

被引：17
|
作者：
Lu Xingdong [1 ]
Shu Wangen
机构：
[1] Jiangxi Univ Finance & Econ, Sch Mat, Nanchang 330013, Peoples R China
[2] Cent S Univ, Coll Chem & Chem Engn, Changsha 330013, Peoples R China
来源：
RARE METALS | 2007年 / 26卷 / 04期
关键词：
inorganic non-metal material; strontium aluminate; persistent luminescence; rare earth ions; point defect;
D O I：
10.1016/S1001-0521(07)60220-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The roles of different point defects in persistent luminescence of SrAl2O4:Eu,Dy phosphors were investigated. The research results showed that Dy-sr(center dot) plays an important role in the persistent luminescence of SrAl2O4:Eu, Dy phosphors. It can serve as the electron trap of suitable depth for persistent luminescence. V-O(center dot center dot) does not serve as the electron trap of suitable depth, but its existence can increase the depth of electron traps. There is interaction between the Dy3+(Dy-Sr(center dot)) and the Eu2+(Eu-Sr(x)), and only if the distance between the Dy3+ (Dy-Sr(center dot)) and the EU2+(Eu-sr(x)) is close enough, the Dy-Sr(center dot) can work as an effective electron trap. The point defect of V ''(Sr) can be hole trap, but the change of its density in crystal matrix does not arouse the obvious change of persistent luminescence.
引用
收藏
页码：305 / 310
页数：6
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