Luminescence properties and energy transfer in K2MgSi4:Ce3+, Tb3+ as a green phosphor
Luminescence properties and energy transfer in K2MgSi4:Ce3+, Tb3+ as a green phosphor
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K2MgSi4:Ce3, Tb3 绿色荧光粉的发光特性和能量传递
DOI：
10.1166/mex.2016.1279
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发表时间：
2016
影响因子：
0.7
通讯作者：
Fang Minghao
中科院分区：
文献类型：
--
作者：
Xia Yufei;Chen Jian;Liu Yan-Gai;Mei Lefu;Huang Zhaohui;Fang Minghao
采用固相反应法合成了系列新型绿色K2MgSiO4:Ce3+、Tb3+荧光粉。分别研究了晶体结构、发光和反射光谱、能量转移机制和温度依赖性性能。通过X射线衍射检测了晶体结构信息，确定了Ce3+离子和Tb3+离子的最佳掺杂浓度分别为4%mol和2%mol。该能量传输机制已被验证为通过偶极-偶极相互作用的谐振型，效率高达 55.1%。通过浓度猝灭法(14.08 Å)和光谱重叠法(15.68 Å)计算了该荧光粉的能量传递临界距离。该荧光粉表现出良好的热稳定性，与初始强度（25℃）相比，在100℃和150℃时仍保持高强度，分别为80.94%和67.75%。
Series new green K2MgSiO4:Ce3+, Tb3+ phosphors were synthesized by solid-state reaction method. The crystal structure, luminescence and reflectance spectra, energy transfer mechanism and temperature dependent performance have been investigated respectively. The information of crystal structure was detected by X-ray diffraction, and the optimized doping concentration of Ce3+ ions and Tb3+ ions were confirmed to 4% mol and 2% mol, respectively. The energy transfer mechanism has been validated to be a resonant type via a dipole–dipole interaction with high efficiency of 55.1%. The energy transfer critical distance of this phosphor was calculated by the concentration quenching method (14.08 Å) and spectral-overlap method (15.68 Å). This phosphor shows good thermal stability which maintains high intensity with 80.94% and 67.75% at 100 °C and 150 °C compared with the initial intensity (25 °C).