Photoluminescence properties of Y_(0.75-x)Gd_xAl_(0.10)BO_3:Eu_(0.10)^(3+),0.05R^(3+)(R= Sc,Bi) (0.00 ≤ x ≤ 0.45)

作     者：李杰 王育华 董其铮 刘吉地 

作者机构：Department of Material Science School of Physics Science and TechnologyLanzhou University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2010年第19卷第6期

页      面：248-253页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10874061) the Doctoral Program Foundation of Institutions of Higher Education of China (Grant No. 20040730019) the Project of the Combination of Industry and Research by the Ministry of Education and Guangdong Province of China (Grant No. 0712226100023) 

主　　题：Sc^3+ Bi^3+ Gd^3+ luminescence intensity chromaticity 

摘      要：Y0.75-xGdxAl0.10BO3：Eu0.10^3＋,0.05R^3＋（R=Sc,Bi）（0.00≤x≤0.45）powder samples are prepared by solid-state reaction and their luminescence properties are investigated. With the replacement of Y^3＋ ions by Sc^3＋ （or Bi^3＋）and Gd^3＋ ions in （Y,Al）BO3：Eu,the intensities of emission at 254 and 147 nm are remarkably improved, because Sc^3＋ inos can absorb UV light and transfer the energy to Eu^3＋ ions efficiently. Moreover, Gd^3＋ and Bi^3＋ ions act as an intermediate ＂bridge＂ between the sensitizer and the activator （Eu^3＋） in energy transfer to produce light in the （Y, Gd）BO3：Bi^3＋, Eu^3＋ system more effectively. After doping an appropriate concentration of Gd^3＋ into Y0.50Gd0.25Al0.10BO3：Eu0.01^3＋,Bi0.05^3＋,the emission intensity reaches its maximum, which is nearly 110% compared with the red commercial phosphor （Y,Gd）BO3：Eu and better chromaticity coordinates （0.650, 0.350） are obtained.