A new oxyapatite red phosphor Eu^(3+)-doped Ca_(3)Y_(7)(BO_(4))(SiO_(4))_(5)O:Synthesis,structure and luminescence properties  

作　　者：Tian Tian Wei Liu Qi Liu Yan Zhang Yaoqing Chu Gan Liu Jiayue Xu 

机构地区：[1]Institute of Crystal Growth,School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China [2]Jiangsu Technology Innovation&C-V2X Academy Co.,Ltd.,Nanjing 210014,China

出　　处：《Journal of Rare Earths》2022年第5期709-716,I0002,共9页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(51972213,61605116,51972208,51802196).

摘　　要：A series of new oxyapatite red phosphors Ca_(3) Y_(7)(BO_(4)) (SiO_(4))_(5) O doped with different concentrations of Eu^(3+)were successfully synthesized by high temperature solid state method.The X-ray diffraction(XRD)Rietveld refinement results show that the structure of the phosphor belongs to space group P6_(3)/m and Eu^(3+)ion replaces Y^(3+)ion.The emission spectrum consists of the characteristic emission peaks corresponding to Eu^(3+)under the excitation of 274 nm and the dominant emission peak is at 614 nm(^(5)D_(0)→^(7)F_(2) of Eu^(3+)).The concentration quenching effect occurs and the optimized Eu^(3+)concentration is 4.0 mol%.The energy level diagram for luminous mechanism is also given and the non-radiative energy transfer mechanism between Eu^(3+)is mainly exchange interaction.The CIE coordinate is close to the ideal red light and the color purity is higher than 99.79%.Moreover,the phosphor exhibits moderate thermal stability because the photoluminescence intensity at 423 K is still maintained at higher than 78.97%of that at room temperature.The internal quantum efficiency of Ca_(3) Y_(7)(BO_(4)) (SiO_(4))_(5) O:4.0 mol%Eu^(3+)phosphor is 58.2%.A red light emitting diode(LED)device based on it can emit bright red light.The CCT values of the device are basically unchanged when driven by various bias current.The results show that Ca_(3) Y_(7)(BO_(4)) (SiO_(4))_(5) O:Eu^(3+)is a new type of oxyapatite red fluorescent material with good comprehensive performances.

关 键 词：Red phosphor Oxyapatite structure Eu3+ions doping LED device Rare earths 

分 类 号：TQ422[化学工程] TN312.8[电子电信—物理电子学]