| Spectroscopic properties of Gd2Oa：Dy3＋ nanocrystals |
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| 引用本文： | 彭玲玲,韩涛,陈慧,张铁军.Spectroscopic properties of Gd2Oa：Dy3＋ nanocrystals[J].中国稀土学报(英文版),2013,31(3):235-240. |
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| 作者姓名： | 彭玲玲 韩涛 陈慧 张铁军 |
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| 作者单位： | Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology,Research Center for Material Interdisciplinary Science,Chongqing University of Arts and Science |
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| 基金项目： | Project supported by the Science and Technology Research Foundation of the Education Commission of Chongqing City (KJ121205);Talent Introduction Project of Chongqing University of Arts and Science (R2012CJ17) |
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| 摘 要： | Gd2O3:Dy3+ nanocrystals were synthesized via solvothermal method followed by a subsequent calcination.The samples were characterized by X-ray diffraction(XRD),transmission electron microsopy(TEM),Electronic dispersive X-ray spectroscopy(EDX),photoluminescence(PL)spectrum and decay curves.The effect of the annealing temperature on the crystallinity and particle size was studied;heat treatment improved the crystallinity of as-prepared nanocrystals as well as increased their particle size.The nanocryatals presented monodispersed spherical shape under TEM.Photoluminescence spectra showed that nanocrystal exhibited strong yellow emission corresponding to 4F9/2→6H13/2 transition(573 nm)of Dy3+ under UV light excitation,which broadened with the particle size decreased without structure changed.The theoretical mechanism of luminescence was explored and surface effect was thought to be the main reason.
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| 关 键 词： | gadolinium oxides nanocrystal photoluminescence surface effect rare earths |
| 收稿时间： | 17 September 2012 |
Spectroscopic properties of Gd2O3:Dy3+nanocrystals |
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| PENG Lingling
,
HAN Tao
,
CHEN Hui
,
ZHANG Tiejun.Spectroscopic properties of Gd2O3:Dy3+nanocrystals[J].Journal of Rare Earths,2013,31(3):235-240. |
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| Authors: | PENG Lingling HAN Tao CHEN Hui ZHANG Tiejun |
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| Affiliation: | (Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology,Research Center for Material Interdisciplinary Science,Chongqing University of Arts and Science,Chongqing 402160,China) |
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| Abstract: | Gd2O3:Dy3+ nanocrystals were synthesized via solvothermal method followed by a subsequent calcination. The samples were characterized by X-ray diffraction (XRD), transmission electron microsopy (TEM), Electronic dispersive X-ray spectroscopy (EDX), photoluminescence (PL) spectrum and decay curves. The effect of the annealing temperature on the crystallinity and particle size was studied; heat treatment improved the crystallinity of as-prepared nanocrystals as well as increased their particle size. The nanocryatals presented monodispersed spherical shape under TEM. Photoluminescence spectra showed that nanocrystal exhibited strong yellow emission corresponding to 4F9/2→6H13/2 transition (573 nm) of Dy3+ under UV light excitation, which broadened with the particle size decreased without structure changed. The theoretical mechanism of luminescence was explored and surface effect was thought to be the main reason. |
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| Keywords: | gadolinium oxides nanocrystal photoluminescence surface effect rare earths |
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