稀土离子Tm^(3+)掺杂MgAl_(2)O_(4)材料发光特性  

Luminescent properties of MgAl_(2)O_(4)material doped with rare earth ions Tm^(3+)

作　　者：鞠泉浩 丁双双 李霜[1] JU Quanhao;DING Shuangshuang;LI Shuang(School of Physics,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学物理学院,吉林长春130022

出　　处：《邵阳学院学报(自然科学版)》2024年第6期52-59,共8页Journal of Shaoyang University:Natural Science Edition

摘　　要：为了探究Tm^(3+)在MgAl_(2)O_(4)材料中的发光特性,采用高温固相法制备了MgAl_(2)O_(4):Tm^(3+)荧光粉材料,并对样品的结构、形貌及发光特性予以表征,研究了Tm^(3+)掺杂浓度对材料发光性能的影响。结果表明,微量的Tm^(3+)掺杂,并未变材料的主相结构,掺杂的Tm^(3+)占据MgAl_(2)O_(4)晶格中的Mg^(2+)位置,从而形成固溶体。晶粒形状为不规则的多边形结构,具有明显的团聚现象,存在较大尺寸不规则颗粒。MgAl_(2)O_(4):Tm^(3+)荧光粉在363nm激光激发下,具有460nm处的强蓝光发射和650nm处的弱红光发射。MgAl_(2)O_(4):Tm^(3+)的最佳发光浓度为0.005,浓度猝灭的影响机制源于Tm^(3+)和空穴之间的能量转移和(Tm^(3+)-Tm^(3+))电偶极-电偶极(d-d)相互作用。该荧光粉均具有良好蓝色发光,在光源器件及多色显示等方面具有广阔的研究前景。To investigate the luminescent properties of Tm^(3+)in MgAl_(2)O_(4) materials,MgAl_(2)O_(4):Tm^(3+)phosphors were prepared using the high-temperature solid-state method.The samples’structure,morphology,and luminescent properties were characterized,and the effects of different Tm^(3+)doping concentrations on the luminescent properties of the materials were analyzed.The results indicated that a small amount of Tm^(3+)doping did not alter the main phase structure of the material.The doped Tm^(3+)occupied the Mg 2+position in the MgAl_(2)O_(4) lattice,forming a solid solution.The grain shape was irregular,exhibiting a polygonal structure with evident agglomeration and large,irregular particles.The MgAl_(2)O_(4):Tm^(3+)phosphor demonstrated strong blue emission at 460 nm and weak red emission at 650 nm under 363 nm laser excitation.The optimal luminescence concentration of MgAl_(2)O_(4):Tm^(3+)was 0.005.The concentration quenching mechanism was due to the energy transfer between Tm^(3+)and holes,as well as the(Tm^(3+)-Tm^(3+))electric dipole-electric dipole(d-d)interaction.With good blue luminescent properties,The phosphor has promising research prospects for applications in light-source devices and multicolor displays.

关 键 词：稀土掺杂 Tm^(3+)发光特性 蓝色荧光粉 下转换发光 

分 类 号：TQ422[化学工程]