The KEu(WO_(4))_(2)Red Phosphor Co-doped with Li^(+)and SO_(4)^(2-)for Synergistic Enhancement of High Efficiency and Thermal Stability  

作　　者：ZHU Hai YUAN Mengzhen ZHENG Liangjian FAN Jia PENG Xinhao ZHANG Jun 朱海;张军

机构地区：[1]Department of Oncology,The Third People’s Hospital of Chengdu,The Affiliated Hospital of Southwest Jiaotong University,Chengdu 610031,China [2]Medical Research Center,The Third People’s Hospital of Chengdu,The Affiliated Hospital of Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第6期1391-1396,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Science and Technology Bureau of Chengdu City(No.2022-YF05-02119-SN)。

摘　　要：A series of tungstate red phosphors K_(1-x)Li_(x)Eu(WO_(4))_(2-y)(SO_(4))_(y)were successfully prepared by sol-gel method,and the effects of the introduction of Li^(+)and SO_(4)^(2-)on the fluorescence intensity and thermal quenching properties of the prepared K_(1-x)Li_(x)Eu(WO_(4))_(2-y)(SO_(4))_(y)phosphors were investigated.The X-ray diffraction data show that the prepared(Li^(+)and SO_(4)^(2-))-doped KEu(WO_(4))_(2)phosphors have a monoclinic tetragonal structure.In addition,the emission intensities of all the observed emission peaks change significantly with the increase of Li~+doping concentration,especially the intensity of the emission peaks at 615 nm fluctuated significantly and reached the maximum at x=0.3 and y=0.2.The K_(1-x)Li_(x)Eu(WO_(4))_(2-y)(SO_(4))_(y)phosphors are found to have the highest fluorescence intensity at x=0.3 and y=0.2.Moreover,the K_(0.7)Li_(0.3)Eu(WO_(4))_(1.8)(SO_(4))_(0.2)phosphor has better thermal quenching properties and luminescence efficiency,and the experimental results indicates that the fluorescence intensity and thermal burst performance of KEu(WO_(4))_(2)red phosphor could be effectively improved by using low-cost bionic doping of Li^(+)and SO_(4)^(2-).

关 键 词：sol-gel fluorescence PHOSPHORS KEu(WO_4)_(2) Li^(+) SO_(4)^(2-) 

分 类 号：TQ422[化学工程]