Preparation and afterglow properties of highly condensed nitridosilicate BaSi7N10:Eu2+ phosphor
Preparation and afterglow properties of highly condensed nitridosilicate BaSi7N10:Eu2+ phosphor
复制标题
高缩合氮化硅酸盐BaSi7N10:Eu2荧光粉的制备及余辉性能
DOI：
10.1016/j.jlumin.2013.10.001
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发表时间：
2014-08-01
影响因子：
3.6
通讯作者：
Xiao, Yong
中科院分区：
文献类型：
--
作者：
Qin, Jinlan;Zhang, Haoran;Xiao, Yong
通过Ba1-xEuxSi合金的氮化，合成了一种新型的氮化硅酸盐荧光粉BaSi7N10:Eu2+。采用合金前驱体可显著降低产品中的氧化物杂质，得到单相产品。合成的BaSi7N10:Eu2+在电磁波谱的紫外部分有较强的吸收，呈现出峰值波长为475 nm的蓝绿色光。随着温度的升高，其发射强度随半最大全宽（FWHM）的增大而减小。有趣的是，在关闭280 nm激发源后，Eu2+ (4f(6)5d（1)-> 4f(7)）可以观察到余辉发射，这是我们所知的第一次发现。这种简单、廉价、产率高的合成路线在其他氮化物的合成中具有重要的应用潜力。(C) 2013 Elsevier B.V.版权所有
A novel nitridosilicate phosphor, BaSi7N10:Eu2+, was synthesized via the nitridation of Ba1-xEuxSi alloy. Oxide impurities in the product can be significantly reduced by the use of alloy precursor to obtain a single phase product. The synthesized BaSi7N10:Eu2+ absorbs strongly in the UV-part of the electromagnetic spectrum and exhibits bluish-green light with a peak wavelength at 475 nm. When temperature is increasing, its emission intensity is decreasing with the broadening full widths at half maximum (FWHM). Interestingly, the afterglow emission of Eu2+ (4f(6)5d(1)-> 4f(7)) could be observed after switching off the 280 nm excitation source, which to the best of our knowledge is found for the first time. This simple, inexpensive and high-yield synthesis route has a significant potential to be applied to other nitrides. (C) 2013 Elsevier B.V. All rights reserved.