Enhanced luminescence of SrSi2O2N2:Eu2+ phosphors by codoping with Ce3+, Mn2+, and Dy3+ ions
Enhanced luminescence of SrSi2O2N2:Eu2+ phosphors by codoping with Ce3+, Mn2+, and Dy3+ ions
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DOI：
10.1063/1.2768916
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发表时间：
2007-08
影响因子：
4
通讯作者：
Ru‐Shi Liu;Yu Liu;N. Bagkar;Shu‐Fen Hu
中科院分区：
文献类型：
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作者：
Ru‐Shi Liu;Yu Liu;N. Bagkar;Shu‐Fen Hu
本文报道了Eu和M（M=Ce，Dy，Mn）掺杂SrSi_2O_2N_2的发光增强特性。在H2（25%）-N2（75%）气氛下，在1400 ° C和1600°C之间的温度下通过固相反应制备Eu和Eu，Mn共掺杂的粉末。Eu，M共掺杂的Sr 1 −x− ySi 2N 2 O2荧光粉具有单斜晶系结构，晶格参数a = 15.6 A，B = 16.2 A，c = 9.4 A，β = 91°。磷光体可以在UV至可见光区域中被有效地激发，使得它们作为用于发光二极管应用的转换磷光体是有吸引力的。在Eu，M共掺杂的Sr 1 −x− ySi 2N 2 O2中观察到黄绿色发光。在SrSi_2O_2N_2的Eu位上添加M，Ce、Dy和Mn的发光强度分别提高了144%、148%和168%。
The authors report here the enhanced luminescence properties of SrSi2O2N2 doped with Eu and M (M=Ce, Dy, and Mn). The Eu and Eu, Mn-codoped powders were prepared by a solid state reaction at temperatures between 1400 and 1600°C under H2 (25%)–N2 (75%) atmosphere. The Eu, M-codoped Sr1−x−ySi2N2O2 phosphors have the monoclinic structure with lattice parameters a∼15.6A, b∼16.2A, c∼9.4A, and β∼91°. The phosphors can be efficiently excited in the UV to visible region, making them attractive as conversion phosphors for a light emitting diode application. A green-yellow emission was observed for Eu,M-codoped Sr1−x−ySi2N2O2. The addition of M in the Eu site in SrSi2O2N2 remarkably enhances the luminescent intensity by the factor of 144%, 148%, and 168% for Ce, Dy, and Mn, respectively.