VUV-vis photoluminescence, low-voltage cathodoluminescence and electron-vibrational interaction of Mn2+ in Ba2MgSi2O7
VUV-vis photoluminescence, low-voltage cathodoluminescence and electron-vibrational interaction of Mn2+ in Ba2MgSi2O7
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Ba2MgSi2O7 中 Mn2 的 VUV-vis 光致发光、低压阴极发光和电子振动相互作用
DOI：
10.1016/j.optmat.2015.02.024
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发表时间：
2015-05
影响因子：
3.9
通讯作者：
Liang Hongbin
中科院分区：
文献类型：
--
作者：
Yan Jing;Brik Mikhail G.;Liu Chunmeng;Hou Dejian;Zhou Weijie;Zhang Bingbing;Huang Yan;Tao Ye;Liang Hongbin
采用高温固相反应法制备了一系列Mn ~（2+）掺杂的Ba 2 MgSi 2 O 7（x= 0.01-0.13）发光材料。测量了它们的VUV-vis光致发光光谱、荧光衰减曲线和低压阴极射线发光光谱，并对其进行了详细讨论。结果表明，Mn ~（2+）离子进入Ba_2MgSi_2O_7基质晶格中的四配位Mg ~（2+）位。从实验光谱中计算了主要的电子振动相互作用参数（如黄-里斯因子、有效声子能量和零声子线位置）。研究了Ba_2MgSi_2O_7：Mn ~（2+）的发光强度和发光衰减随浓度和温度的变化关系，提出了Mn ~（2+）在Ba_2MgSi_2O_7中的能级结构。由于在低电压电子束激发下的高发射强度，进一步优化的样品Ba 2 Mg 0. 95 Mn 0. 05 Si 2 O 7可以被认为是场发射显示器（FED）的有希望的绿色荧光粉。
A series of Mn2+doped Ba2MgSi2O7phosphors with a nominal formula Ba2Mg1−xMnxSi2O7(x= 0.01–0.13) were prepared by a high-temperature solid-state reaction technique. Their VUV–vis photoluminescence spectra, fluorescence decay curves, and low-voltage cathodoluminescence spectra were measured and discussed in detail. The results confirm that the Mn2+ions enter into the four-coordinated Mg2+site in Ba2MgSi2O7host lattice. The main electron-vibrational interaction (EVI) parameters (such as Huang–Rhys factor, effective phonon energy and position of the zero-phonon line) were evaluated from the experimental spectra. Furthermore, the concentration and the temperature dependence of the emission intensity and the luminescence decays of Ba2MgSi2O7:Mn2+were investigated, accordingly the schematic energy levels for Mn2+in Ba2MgSi2O7were proposed. Due to the high emission intensity under low-voltage electron beam excitation, a further optimized sample Ba2Mg0.95Mn0.05Si2O7can be considered as a promising green phosphor for field emission displays (FEDs).
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