Tunable Emission and Energy Transfer of the Novel KY_(1-x)(MoO_(4))_(2-y)(WO_(4))y:xLn^(3+)(Ln^(3+)=Dy^(3+),Eu^(3+),and Tm^(3+))Single-phase White Luminescence Phosphor for White LEDs  

作　　者：ZHU Hai HE Bin HUANG Weigang 

机构地区：[1]Department of Oncology,The Third People's Hospital of Chengdu,Afiliated Hospital of Southwest Jiaotong University&The Second Affiliated Hospital of Chengdu,Chongqing Medical University,Chengdu 610031,China [2]Medical Research Center,The Third People's Hospital of Chengdu,Afiliated Hospital of Southwest Jiaotong University&The Second Afiliated Hospital of Chengdu,Chongqing Medical University,Chengdu 610031,China [3]National Engineering Research Center for Biomaterials,College of Biomedical Materials,Sichuan University,Chengdu 610064,China [4]College of Materials Science and Engineering,Sichuan University,Chengd 610064,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第6期1278-1286,共9页武汉理工大学学报（材料科学英文版）

摘　　要：The phosphors of KY_(1-x)(MoO_(4))_(2-y)(WO_(4))y:xLn^(3+)(Ln^(3+)=Tm^(3+),Dy^(3+),Eu^(3+))were synthesized by using a sol-gel method.Then,the crystal structure,luminescence properties,energy transfer,and white emission of the prepared materials were researched.The molar ratio of the anion group on the photoluminescence(PL)emission and excitation intensity were investigated,revealing that the optimum intensity could be obtained by using=3:1.The optimal Dy^(3+) doping concentration of KY(MoO_(4))1.5(WO4)0.5was obtained.In addition,the color-tunable emissions of Dy^(3+)/Eu^(3+)-codoped KY(MoO_(4))1.5(WO4)0.5phosphors were observed because of the effective energy transfer(ET)from Dy^(3+)to Eu^(3+)ions.Finally,by doping appropriate concentrations of Tm^(3+),Dy^(3+),and Eu^(3+)and different concentrations of(WO_(4))^(2-),white light emitting phosphors KY_(0.92)(WO_(4))2:0.01Tm^(3+),0.06Dy^(3+),0.01Eu^(3+)with excellent color-rending properties were obtained.The chromaticity coordinate was calculated as(x=0.3238,y=0.3173),closing to the artificial daylight(D65,x=0.313,y=0.329)illuminant,and which indicates the potential application of near ultraviolet White light-emitting diodes(WLEDs).

关 键 词：rare earth PHOSPHORS white LEDs energy transfer sol-gel method 

分 类 号：TB34[一般工业技术—材料科学与工程]