White light emission in Pr^(3+),Tb^(3+):CaYAlO_4 phosphor  

作　　者：陈巧玲 吕少珍 

机构地区：[1]Fujian University of Technology

出　　处：《Optoelectronics Letters》2015年第5期370-374,共5页光电子快报（英文版）

基　　金：supported by the Natural Science Foundation of Fujian University of Technology(No.4Y-Z15001)

摘　　要：In this work, the synthesis and photoluminescence characteristics of two new phosphors Pr3+: CaYAlO4(CYA) and Pr3+/Tb3+: CYA for light emitting diodes(LEDs) are investigated. 0.5%(atom percentage) Pr3+: CYA exhibits the largest bright yellow emission by varying the Pr3+ concentration, owing to the cross-relaxation process of 3P0 +3H4→ 1G4+1G4. The energy level diagram in Pr3+: CYA, especially the positions of 4f5 d level and 1S0 level, is discussed. By co-doping Tb3+ ions, the color coordinates of Pr3+/Tb3+: CYA phosphor can be tuned from yellow to white region. Finally, the strongest luminescence emission with color coordinates of(0.339, 0.364) located in the white region can be obtained in 0.3%Tb3+/0.5%Pr3+: CYA phosphor.

关 键 词：phosphor Tb coordinates relaxation yellow doping tuned luminescence bright annealing 

分 类 号：TN312.8[电子电信—物理电子学]