Development of a novel Eu^(3+)-doped tantalate red-emitting phosphor for w-LEDs application  

作　　者：Fan Zeng Jingjing Ru Bing Zhao Feiyun Guo Jianzhong Chen 

机构地区：[1]College of Chemistry and Materials,Fujian Province University Key Laboratory of Green Energy and Environment Catalysis,Ningde Normal University.Ningde,352100,China [2]School of Environment and Resources,School of Carbon Neutral and Modern Industry,Fujian Normal University,Fuzhou,350007,China [3]College of Information and Mechanical&Electrical Engineering,Ningde Normal University,Ningde,352100,China [4]College of Chemistry,Fuzhou University,Fuzhou,350108,China

出　　处：《Journal of Rare Earths》2024年第8期1479-1488,I0003,共11页稀土学报（英文版）

基　　金：supported by the Foundation of Fujian Provincial Department (2021J011149)。

摘　　要：Two novel phosphors LiBa_(4(1-x))Eu_(4x)Ta_(3)O_(12)(H-LBTO:xEu^(3+)) and Li_(0.25)Ba_(1-x)Eu_(x)Ta_(0.75)O_(3)(C-LBTO:xEu^(3+))were prepared successfully by a molten salt method.The transformation between these two structures was realized by changing the sintering temperature or changing the Eu^(3+) ions concentration,which was also demonstrated by the X-ray diffraction(XRD),scanning electron microscopy(SEM),diffuse reflectance spectra(DRS),and photoluminescence excitation(PLE) analyses,Both the sintering temperature and the Eu^(3+)ions doping concentration have significant impact on the formation of the crystal phase.All these phosphors sintered at 1023 K exhibit two major luminescence lines at 594 and 614 nm under nearUV light of 395 nm excitation,corresponding to Eu^(3+)ions typical transitions of ^(5)D_(0)→^(7)F_(1) and ^(5)D_(0)→^(7)F_(2).The optimum concentration of Eu^(3+) ions is 9 mol% for C-LBTO:xEu^(3+) samples and the quenching interaction type is the nearest-neighbor ion interaction.The thermal stability of the C-LBTO:0.09Eu^(3+)sample was investigated in detail and the device application further suggests that C-LBTO:0.09Eu^(3+) can be used as a red phosphor for near-UV excited w-LEDs in lighting.

关 键 词：PHOSPHOR TANTALATE LED device Rare earths 

分 类 号：TN312.8[电子电信—物理电子学] TQ422[化学工程]