Synthesis and luminescence properties of Sr_(3-z)(Al_xSi_(1-x))O_(5-x)F_x:zCe^(3+) phosphors  

作　　者：马小乐 庄卫东 郭汉杰 刘荣辉 刘元红 何华强 彭鹏 陈磊 

机构地区：[1]National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals,and Grirem Advanced Materials Co.,Ltd. [2]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing

出　　处：《Journal of Rare Earths》2013年第7期665-668,共4页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China(50902011);the National Hi-Tech R&D Program of China(863 Program,2011AA03A101)

摘　　要：Sr3-z（AlxSi1-x）O5-xFx：zCe^3＋ phosphors were synthesized by high-temperature solid-state reaction. The structure and lumi- nescence properties of phosphors with various A1/Si ratios and Ce3＋ concentrations were characterized using various methods such as X-ray diffraction, photoluminescence excitation and photoluminescence spectra. XRD result displayed that a complete solid solution between Sr3AlO4F and Sr3SiO5 was formed. With the increasing ofx value, a broader excitation band and stronger absorption appeared in the blue light region. Moreover, the emission band shifted to a shorter wavelength and the emission intensity reached a maximum at x=0.6. By adjusting the concentration of Ce3＋, a widely tunable range of emission wavelength under the excitation of 460 um was obtained from the green to yellow regions. In addition, the concentration and thermal quenching were also discussed.Sr3-z（AlxSi1-x）O5-xFx：zCe^3＋ phosphors were synthesized by high-temperature solid-state reaction. The structure and lumi- nescence properties of phosphors with various A1/Si ratios and Ce3＋ concentrations were characterized using various methods such as X-ray diffraction, photoluminescence excitation and photoluminescence spectra. XRD result displayed that a complete solid solution between Sr3AlO4F and Sr3SiO5 was formed. With the increasing ofx value, a broader excitation band and stronger absorption appeared in the blue light region. Moreover, the emission band shifted to a shorter wavelength and the emission intensity reached a maximum at x=0.6. By adjusting the concentration of Ce3＋, a widely tunable range of emission wavelength under the excitation of 460 um was obtained from the green to yellow regions. In addition, the concentration and thermal quenching were also discussed.

关 键 词：LUMINESCENCE solid solution thermal quenching concentration quenching rare earths 

分 类 号：TN104.3[电子电信—物理电子学] TN305