【摘 要】
：
A series of Sr2MgSi2O7∶Tb3+ 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 Tb3+ ions.However,the images of the scanning
【机 构】
：
School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China;School of
论文部分内容阅读
A series of Sr2MgSi2O7∶Tb3+ 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 Tb3+ ions.However,the images of the scanning electron microscope illustrate that the average size of nanoparticles becomes larger with the increase of Tb3+ concentration.Unlike earlier investigations on down-conversion emission of Tb3+ ion excited by deep ultraviolet light,in this work,the photoluminescence characteristics of Sr2MgSi2O7 nanophosphors doped with different Tb3+ 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 Tb3+ ions.
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