Sol-gel synthesis and photoluminescence properties of BaSO4/Y2O3:Eu3+ core-shell submicrospheres

被引：0
|
作者：
Zhang Ming [1 ]
Li Xinhai [1 ]
Wang Zhixing [1 ]
Hu Qiyang [1 ]
Li Jinhui [1 ]
Liu Wanrong [1 ]
机构：
[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2009年 / 27卷 / 06期
关键词：
phosphor; sol-gel; core-shell; photoluminescence; rare earths; PARTICLES;
D O I：
10.1016/S1002-0721(08)60356-7
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Europium-doped nanocrystalline Y2O3 phosphor layers were coated on the surface of preformed submicron BaSO4 spheres via the sol-gel process. The obtained BaSO4/Y2O3:Eu3+ core-shell phosphors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and photoluminescence spectra. The results showed that the obtained BaSO4/Y2O3:Eu3+ core-shell phosphors consisted of well-dispersed submicron spherical particles with narrow size distribution and non-agglomeration. TEM and EDS results showed that BaSO4 particles were well coated with the shell of Y2O3 :Eu3+. XRD result demonstrated that no reaction occurred between the BaSO4 cores and the Y2O3:Eu3+ shells even after annealing at 1200 degrees C. The BaSO4/Y2O3:Eu3+ core-shell particles showed a red emission corresponding to D-5(0)-F-7(2) of Eu3+ under the excitation of ultraviolet.
引用
收藏
页码：891 / 894
页数：4
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