Solvothermal fabrication and luminescent properties of nanoLuAG:Ce phosphors
Solvothermal fabrication and luminescent properties of nanoLuAG:Ce phosphors
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DOI：
10.1049/mnl.2013.0642
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发表时间：
2014-02
影响因子：
1.3
通讯作者：
L. Xing;L. Qu;Q. He;T. Tang;Linfeng Yang
中科院分区：
文献类型：
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作者：
L. Xing;L. Qu;Q. He;T. Tang;Linfeng Yang
以乙二胺为溶剂，金属硝酸盐为起始原料，采用溶剂热法合成了纳米 Ce 掺杂镥铝石榴石 (LuAG:Ce) 荧光粉。通过X射线衍射、透射电子显微镜和光致发光光谱研究了所制备荧光粉的相发展、形貌和发光性能，结果表明，在230oC低温下加热8 h后，得到了高相纯度的荧光粉。该粉末具有良好的分散性，很少或没有团聚，平均晶粒尺寸为220 nm，尺寸分布窄，因此可用于制备LuAG:Ce光学陶瓷。还检查了其激发和发射光谱，证实了 Ce3+ 离子的 4f 和 5d 态之间的跃迁是光致发光机制。光致发光衰减显示与LuAG:Ce单晶几乎相同的成分，这进一步证明所获得的纳米尺寸荧光粉已良好结晶。
Nanosized Ce-doped lutetium aluminium garnet (LuAG:Ce) phosphors have been synthesised by a solvothermal method using ethylenediamine as the solvent and metal nitrates as the starting materials. The phase development, the morphology and the luminescent properties of the prepared phosphors were investigated with X-ray diffractometry, transmission electron microscopy and photoluminescence spectra, which showed that phosphors of high phase purity resulted after heating for 8 h at a low temperature of 230oC. This powder possesses good dispersivity, suffers little or no aggregation and has an average grain size of 220 nm with narrow size distribution, hence, it may be exploited for the fabrication of LuAG:Ce optical ceramics. Its excitation and emission spectra have also been examined, which confirms the transitions between the 4f and the 5d states of the Ce3+ ions as the photoluminescence mechanism. The photoluminescence decay showed almost identical components compared with the LuAG:Ce single crystal, which further proves that the obtained nanosized phosphors have been well crystallised.