Ca_3La(BO_3)_3中Dy^(3+)的光致发光  

Study on Photoluminescence of Dy^(3+) Ions in Ca_3La(BO_3)_3

作　　者：李其华[1] 刘利民[1] 雷春华[1] 朱小娟[1] 彭夷安[1] 

机构地区：[1]湖南师范大学化学化工学院,湖南长沙410081

出　　处：《湖南有色金属》2004年第1期29-31,共3页Hunan Nonferrous Metals

基　　金：湖南省教育厅资助项目(01C039)

摘　　要：研究了Ca3La(BO3)3基质中Dy3+的发射光谱和激发光谱。结果表明,强的激发峰值为351nm、367nm和386nm;Dy3+的488nm和578nm发射的最佳浓度均为xDy=0 03;Dy3+发射的黄光和蓝光强度比(用Y/B表示)随Dy3+浓度的增加而逐渐增大;Dy3+的4F9/26H15/2、6H13/2跃迁发射的浓度猝灭机理均为电偶极-电偶极相互作用;同时还探讨了Ce3+对Dy3+发光的敏化作用。In this paper,the photoluminescence of Dy^(3+) mon-doped or Dy^(3+),Ce^(3+) codoped in Ca_3La(BO_3)_3 have been studied.The Dy^(3+) content on the emission intensity and the yellow to blue intensity rate(Y/B)of Dy^(3+) have been investigated too.The results indicate that Ce^(3+) can sensitize the luminescence of Dy^(3+).The optimum concentration of Dy^(3+) in Ca_3La(BO_3)_3 is x_(Dy)=0.03.According to the concentration of Dy^(3+) in Ca_3La(BO_3)_3 under the excitation of 351?nm,it has been confirmed that the mechanism of concentration selfquenching of Dy^(3+4)F_(9/2)~6H_(15/2),~6H_(13/2)transition are dipole-dipole interaction.

关 键 词：DY^3+ Ca3La(BO3)3 光致发光 浓度猝灭 

分 类 号：TG146.454[一般工业技术—材料科学与工程]