Origin of White Luminescence in Ag-Eu Co-doped Oxyfluoride Glasses

Origin of White Luminescence in Ag-Eu Co-doped Oxyfluoride Glasses
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Ag-Eu共掺杂氟氧化物玻璃中白光发光的起源

DOI:
10.1149/1.3568950
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发表时间:
2011-06
影响因子:
3.9
通讯作者:
Zhang, Hao
Zhang, Hao
中科院分区:
工程技术4区
文献类型:
--
作者:
Guo, Hai;Li, JingJing;Li, Fang;Zhang, Hao

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在Ag-Eu共掺杂的氟化氧玻璃中,出现了红、绿、蓝三种发光的组合,实现了纯白色发光(X=0.323, Y=0.320)。利用吸收光谱、发射光谱、激发光谱、衰变寿命测量和时间分辨光谱等方法研究了发光物质的种类、白色发光的来源以及红蓝发光的增强机理。结果证明,白色辐射来源于Eu 3+的f-f跃迁(红色)、ML-Ag(非常小的类分子非等离子体银粒子,绿色)和Eu 2+的5d-4f跃迁(蓝色)。我们的研究表明,Ag-Eu共掺杂玻璃可以为设计和制造用于紫外发光二极管(LED)芯片的新型荧光粉提供新的平台。
A combination of red, green and blue emissions has emerged to achieve pure white emission (X=0.323, Y=0.320) in Ag-Eu co-doped oxyfluoride glasses. The type of luminescent species, the origin of white emission and the enhancement mechanism for red and blue emissions were investigated by means of absorption, emission and excitation spectra, decay lifetime measurements, as well as time-resolved spectroscopy. Results prove that white emission is originated from f-f transitions of Eu 3+ (red), ML-Ag (very small molecule-like, non-plasmonic Ag particles, green) and 5d-4f transition of Eu 2+ (blue). Our researches show that Ag-Eu co-doped glasses may provide a new platform to design and fabricate novel phosphors for ultraviolet light-emitting diode (LED) chips.
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