Growth and optical properties of Dy^(3+)/Eu^(3+) co-doped NaYF_4 single crystals with cubic lattice for white LED application  

作　　者：江东升 姜永章 夏海平 张加忠 杨硕 谷雪梅 江浩川 陈宝玖 

机构地区：[1]Key Laboratory of Photoelectronic Materials,Ningbo University [2]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences [3]Department of Physics,Dalian Maritime University

出　　处：《Optoelectronics Letters》2015年第5期356-360,共5页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51472125 and 51272109);the K.C.Wong Magna Fund in Ningbo University

摘　　要：Dy3+/Eu3+ co-doped cubic lattice Na YF4 single crystal with high quality in the size of ~Φ1.0 cm×10.0 cm was grown by an improved Bridgman method using potassium fluoride(KF) as assistant flux. X-ray diffraction(XRD), absorption spectra, excitation spectra and emission spectra are measured to investigate the phase and luminescent properties of the crystal. The effects of excitation wavelength and concentrations of Dy3+ and Eu3+ ions on the luminescent characteristics are analyzed. The Na YF4 single crystal with the doping molar concentrations of 1.205% Dy3+ and 0.366% Eu3+ exhibits an excellent white light emission with chromaticity coordinates of x=0.321, y=0.332. It indicates that the Dy3+/Eu3+ co-doped cubic lattice Na YF4 single crystal can be a potential luminescent material for the ultraviolet(UV) light excited white light emitting diode(w-LED).

关 键 词：cubic Eu luminescent Bridgman coordinates excitation ultraviolet doping potassium fluoride 

分 类 号：TN312.8[电子电信—物理电子学]