Photoluminescence of green nanophosphors Sr_(2)MgSi_(2)O_(7)doped with Tb^(3+)under 374-nm excitation  

作　　者：Bo-Shi Mu Yi Zhang Qing-Feng Bian Cheng-Ren Li Zhi-Chao Li Yun-Ting Chu Feng Zhao Jing-Chang Sun 牟博石;张熠;边庆丰;李成仁;李志超;褚云婷;赵峰;孙景昌(School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China;School of Science,Qiqihar University,Qiqihar 161006,China)

机构地区：[1]School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China [2]School of Science,Qiqihar University,Qiqihar 161006,China

出　　处：《Chinese Physics B》2021年第12期343-347,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11004092);the Foundation of Science and Technology Department of Liaoning Province,China(Grant No.201602455)。

摘　　要：A series of Sr_(2)MgSi_(2)O_(7):Tb^(3+)nanophosphors is prepared using a high-temperature solid-state reaction.The x-ray diffraction patterns show that the crystal structure of the sample is not significantly affected by Tb^(3+)ions.However,the images of the scanning electron microscope illustrate that the average size of nanoparticles becomes larger with the increase of Tb^(3+)concentration.Unlike earlier investigations on down-conversion emission of Tb^(3+)ion excited by deep ultraviolet light,in this work,the photoluminescence characteristics of Sr_(2)MgSi_(2)O_(7)nanophosphors doped with different Tb^(3+)concentrations are analyzed under 374-nm excitations.The intense green emission at 545 nm is observed at an optimal doping concentration of 1.6 mol%.The main reason for the concentration quenching is due to the electric dipole-electric dipole interaction among Tb^(3+)ions.

关 键 词：Sr_(2)MgSi_(2)O_(7):Tb^(3+)nanophosphor green emission 374-nm excitation electric dipole-electric dipole interaction 

分 类 号：O482.31[理学—固体物理] TQ422[理学—物理]