Energy Transfer and Tunable Luminescence of NaLa(PO3)4:Tb3+/Eu3+ under VUV and Low-Voltage Electron Beam Excitation
Energy Transfer and Tunable Luminescence of NaLa(PO3)4:Tb3+/Eu3+ under VUV and Low-Voltage Electron Beam Excitation
复制标题
DOI：
10.1021/jp410131q
复制
发表时间：
2014-01
影响因子：
3.7
通讯作者：
Chunmeng Liu;Dejian Hou;Jing Yan;Lei Zhou;Xiao-yan Kuang;Hongbin Liang;Yan Huang;Bingbing Zhang-Bingbing
中科院分区：
文献类型：
--
作者：
Chunmeng Liu;Dejian Hou;Jing Yan;Lei Zhou;Xiao-yan Kuang;Hongbin Liang;Yan Huang;Bingbing Zhang-Bingbing
采用高温固相反应法制备了NaLa（PO 3）4：Tb 3 +/Eu 3+系列荧光粉。基于粉末X射线衍射（XRD）数据进行结构细化。利用VUV-UV-维斯光致发光（PL）、荧光衰减、时间分辨发射光谱（TRES）和低压阴极发光（CL）光谱研究了其发光和能量传递过程。在真空紫外-紫外光和低压电子束激发下，NaLa（PO 3）4：Tb 3+和NaLa（PO 3）4：Eu 3+分别呈现Tb 3+（5D4 → 7 FJ）和Eu 3+（5D 0 → 7 FJ）的特征发射。通过调节Eu ~（3+）离子在NaTb_（0.70）La（0.30-x）Eux（PO_3）_4中的掺杂浓度，实现了大色域的可调谐发光，并对其中Tb ~（3+）向Eu ~（3+）的能量传递进行了详细的观察和讨论。由于NaLa（PO 3）4：Tb 3 +/Eu 3+荧光粉具有良好的VUV-vis发光和化学发光性能，在等离子体显示器（PDP）和场发射显示器（FED）中具有良好的应用前景。
Series of NaLa(PO3)4:Tb3+/Eu3+ phosphors were prepared by a high-temperature solid-state reaction technique. Structure refinements were performed based on powder X-ray diffraction (XRD) data. VUV–UV–vis photoluminescence (PL), fluorescence decays, time-resolved emission spectra (TRES), and low-voltage cathodoluminescence (CL) spectra were utilized to investigate the luminescence and energy transfer processes. Under VUV–UV light and low-voltage electron beam excitation, NaLa(PO3)4:Tb3+ and NaLa(PO3)4:Eu3+ exhibit characteristic emissions of Tb3+ (5D4 → 7FJ) and Eu3+ (5D0 → 7FJ), respectively. By adjusting the doping concentration of Eu3+ ions in NaTb0.70La(0.30-x)Eux(PO3)4, tunable emission colors are realized in a large color gamut, in which energy transfer from Tb3+ to Eu3+ was observed and discussed in detail. On the basis of the good VUV–vis PL and CL properties, NaLa(PO3)4:Tb3+/Eu3+ phosphors might be promising for applications in plasma display panels (PDPs) and field emission displays (FEDs).