Enhanced afterglow performance of CaAl_(2)O_(4):Eu^(2+),Nd^(3+) phosphors by co-doping Gd^(3+)

作     者：Mingxi Zhang Fengfeng Li Yongcheng Lin Yan Li Yi Shen Mingxi Zhang;Fengfeng Li;Yongcheng Lin;Yan Li;Yi Shen

作者机构：Light Alloy Research Institute of Central South UniversityChangsha 410083China Key Laboratory of Inorganic Nonmetallic Materials Hebei ProvinceKey Laboratory of Environment Functional Materials of Tangshan CityCollege of Materials Science and EngineeringNorth China University of Science and TechnologyTangshan 063210China School of Mechanical and Electrical Engineering.Central South UniversityChangsha 410083China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2021年第39卷第8期

页      面：930-937页

核心收录：

学科分类：081702[工学-化学工艺] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：the National Natural Science Fund of China(51772099,51572069,51872091) Scientific and Technological Research Projects of Colleges and Universities in Hebei Province(QN2019049) the Doctoral Initiation Fund(BS2017025) 

主　　题：CaAl_(2)O_(4):Eu^(2+),Nd^(3+) Gd^(3+)ions Afterlow Trap depth Mechanism Rare earths 

摘      要：In order to effectively improve the afterglow properties of CaAl_(2)O_(4):Eu^(2+),Nd^(3+) phosphors,a series of Ca_(0.982-x)Al_(2)O_(4):0.012 Eu^(2+),0.006 Nd^(3+),xGd^(3+)(x=0,0.012,0.024,0.036,0.048,0.060 mol) phosphors were prepared by a high-temperature solid-phase *** composition and microstructure were characterized by XRD,TEM,HRTEM,and XPS,luminescence properties were systematically analyzed by fluorescence spectra,afterglow decay curves and TL glow *** show that all of Ca_(0.982-x)Al_(2)O_(4):0.012 Eu^(2+),0.006 Nd^(3+),xGd^(3+)phosphors belong to monoclinic CaAl_(2)O_(4),without other cystalline *** blue emission at 442 nm is observed,which is assigned to the 4f^(6)5 d→4f^(7) transition of Eu^(2+) *** with appropriate amount of Gd^(3+) ions(x=0.036 mol) significantly improves the afterglow properties of phosphors,but the excessive doping of Gd^(3+) induces the fluorescent *** doping of moderate Gd^(3+) changes the traps states,the trap depth varies from 0.598 to 0.644 eV and the trap concentration is also greatly improved,thus significantly improving afterglow performance.