期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 119, 期 1-2, 页码 52-56出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2009.07.037
关键词
Yttrium oxysulfide; Luminescence; Nanoparticles; Long-lasting phosphor
资金
- National Natural Science Foundation of China [20671042, 50872045]
- Natural Science Foundations of Guangdong Province [0520055, 7005918]
We report an effective method to synthesize Y2O2S:Eu3+, Mg2+, Ti4+ nanoparticles. Tube-like Y(OH)(3) were firstly synthesized by hydrothermal method to serve as the precursor. Nanocrystalline long-lasting phosphor Y2O2S:Eu3+, Mg2+, Ti4+ was obtained by calcinating the precursor with co-activators and S powder. XRD investigation shows a pure phase of Y2O2S, indicating no other impurity phase appeared. SEM and TEM observation reveals that the precursor synthesized via a hydrothermal routine has tube-like structure and the final phosphor reveals a hexagonal shape. The fine nanoparticles which have the particle size ranging from 30 to 50 nm show uniform size and well-dispersed distribution. From the spectrum, the main emission peaks are ascribed to Eu3+ ions transition from D-5(J) (J = 0, 1, 2) to F-7(J) (J = 0, 1, 2, 3, 4). After irradiation by 325 nm for 10 min, the Y2O2S:Eu3+, Mg2+, Ti4+ long-lasting phosphor shows very bright red afterglow and the longest could last for more than 1 h even after the irradiation source had been removed. It is considered that the long-lasting phosphorescence is due to the contribution from the electron traps with suitable trap depth. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据