A novel strong green phosphor:K_3Gd(PO_4)_2:Ce^(3+),Tb^(3+) for a UV-excited white light-emitting-diode  

作　　者：姜庭明 余雪 徐旭辉 周大成 余红玲 杨鹏辉 邱建备 

机构地区：[1]College of Materials Science and Engineering,Kunming University of Science and Technology [2]Key Laboratory of Advanced Materials of Yunnan Province

出　　处：《Chinese Physics B》2014年第2期570-574,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.11204113,61265004,and 51272097);the Foundation of Application Research of Yunnan Province,China (Grant No.2011FB022);the Chinese Specialized Research Fund for the Doctoral Program of Higher Education (Grant No.20115314120001);the Postdoctoral Science Foundation of China (Grant No.2011M501424);the National Basic Research Program of China (Grant No.2011CB211708)

摘　　要：A series of K3Gd1-x-y（PO4）2：xCe^3＋, yTb^3＋ phosphors are synthesized by the solid-sate reaction method. X-ray diffraction and photoluminescence spectra are utilized to characterize the structures and luminescence properties of the as-synthesized phosphors. Co-doping of Ce^3＋ enhances the emission intensity of Tb^3＋ greatly through an efficient energy transfer process from Ce^3＋ to Tb^3＋. The energy transfer is confirmed by photoluminescence spectra and decay time curves analysis. The efficiency and mechanism of energy transfer are investigated carefully. Moreover, due to the non- concentration quenching property of K3Tb（PO4）2, the photoluminescence spectra of K3Tb1-x（PO4）2：xCe^3＋ are studied and the results show that when x = 0.11 the strongest Tb^3＋ green emission can be realized.A series of K3Gd1-x-y（PO4）2：xCe^3＋, yTb^3＋ phosphors are synthesized by the solid-sate reaction method. X-ray diffraction and photoluminescence spectra are utilized to characterize the structures and luminescence properties of the as-synthesized phosphors. Co-doping of Ce^3＋ enhances the emission intensity of Tb^3＋ greatly through an efficient energy transfer process from Ce^3＋ to Tb^3＋. The energy transfer is confirmed by photoluminescence spectra and decay time curves analysis. The efficiency and mechanism of energy transfer are investigated carefully. Moreover, due to the non- concentration quenching property of K3Tb（PO4）2, the photoluminescence spectra of K3Tb1-x（PO4）2：xCe^3＋ are studied and the results show that when x = 0.11 the strongest Tb^3＋ green emission can be realized.

关 键 词：K3Gd（PO4）2：Ce^3＋ Tb^3＋ energy transfer photoluminescence 

分 类 号：TN312.8[电子电信—物理电子学] TQ132.41[化学工程—无机化工]