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| Na2GdPO4F2:Tb3+绿色荧光粉阴极射线发光研究 | |
| 作者姓名： | Li SB Zhao WY Fan B An SL |
| 作者单位： | 1. 北京科技大学冶金与生态工程学院,北京100083;内蒙古科技大学化学与化工学院,内蒙古包头014010 2. 内蒙古科技大学化学与化工学院,内蒙古包头,014010 3. 北京科技大学冶金与生态工程学院,北京100083;内蒙古科技大学材料与冶金工程学院,内蒙古包头014010 |
| 基金项目： | 全国高校青年教师教学科研奖励计划和内蒙古自然科学基金项目 |
| 摘 要： | 通过高温固相法制备Na2GdPO4F2:Tb3+绿色荧光粉,并利用X射线粉末衍射(XRD)和阴极射线光谱分别对其物相、阴极射线发光性能进行研究.结果表明,Tb3+作为绿色发光中心进入到Na2Gd2PO4F2的晶格中取代Gd3+的格位,在低电子束(0.5～5 kV)激发下主要表现出Tb3+的特征跃迁(5D3.4→7FJ,J=6～2),其中以5D4→7F5跃迁(546 nn)为主.样品Na2Gd0.95Tb0.05PO4F2在阴极射线激发下的色坐标为(0.240 3,0.438 6).随着电压、电流和掺杂量的增加,荧光粉的发光强度逐渐提高,其中,最佳的样品为Na2Gd0.9Tb0.1PO4F2. |
| 关 键 词： | 阴极射线发光 绿色荧光粉 |
Cathodoluminescent properties of Na2GdPO4F2:Tb3+ green phosphors |
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| Li SB,Zhao WY,Fan B,An SL.Cathodoluminescent properties of Na2GdPO4F2:Tb3+ green phosphors[J].Spectroscopy and Spectral Analysis,2011,31(5):1181-1184. | |
| Authors: | Li Song-bo Zhao Wen-yu Fan Bin An Sheng-li |
| Institution: | School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China. lisongbo@imust.cn |
| Abstract: | The green emitting phosphors, Na2GdPO4F2:Tb3+, was synthesized by high temperature solid-state method. X-ray diffraction (XRD) and cathodoluminescence (CL) spectrum were used to characterize the samples. Under the low-voltage electron beam (0.5 - 5 kV) excitation, the Tb3+-doped Na2GdPO4F2 phosphor showed a very strong green emission corresponding to the characteristic transitions of Tb3+ (5D3,4 --> F(J) transitions, J = 6 - 2) with the strongest emission at 546 nm, corresponding to 5D4 --> F5 of Tb3+. The cathodoluminescent color of Na2Gd0.95Tb0.05PO4F2 was green to the naked eye with the Commission International de l'Eclairage (CIE) coordinates of x = 0.2403, y = 0.4386, and the color temperature at about 8634.3 K. The CL intensity increases upon raising the accelerating voltage, filament current and the doping concentrations, thereinto, the optimal concentrations of Tb3+ is 10 mol%. |
| Keywords: | Na2GdPO4F2:Tb3+ |
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