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Synthesis and characterization of Sr3Al2O6:Eu2+, Dy3+ phosphors prepared by sol-gel-combustion processing
引用本文:黄平,崔彩娥,王森.Synthesis and characterization of Sr3Al2O6:Eu2+, Dy3+ phosphors prepared by sol-gel-combustion processing[J].中国物理 B,2009,18(10):4524-4531.
作者姓名:黄平  崔彩娥  王森
作者单位:Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China;Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China;Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China
基金项目:Project supported by the Key Research Project of Science and Technology of Shanxi, Shanxi Province, China (Grant No 2007031141), the Natural Science Foundation of Shanxi Province, China (Grant No 2007011061), and the Scientific Research Foundation of the
摘    要:A type of red luminescent Sr3Al2O6:Eu2+, Dy3+ phosphor powder is synthesised by sol-gel-combustion processing, with metal nitrates used as the source of metal ions and citric acid as a chelating agent of metal ions. By tracing the formation process of the sol-gel, it is found that it is necessary to reduce the amount of NO3- by dropping ethanol into the solution for forming a stable and homogeneous sol-gel. Thermogravimetric and Differential Scanning Calorimeter Analysis, x-ray diffractionmeter, scanning electron microscopy and photoluminescence spectroscopy are used to investigate the luminescent properties of the as-synthesised Sr3Al2O6:Eu2+, Dy3+. The results reveal that the Sr3Al2O6 crystallises completely when the combustion ash is sintered at 1250 C. The excitation and the emission spectra indicate that the excitation broadband lies mainly in a visible range and the phosphors emit a strong light at 618 nm under the excitation of 472 nm. The afterglow of (Sr0.94Eu0.03Dy0.03)3Al2O6 phosphors sintered at 1250 ℃ lasts for over 1000 s when the excited source is cut off.

关 键 词:Sr3Al2O6:Eu2+  Dy3+  phosphors  red  luminescence  sol-gel-combustion  method
收稿时间:2008-12-11

Synthesis and characterization of Sr3Al2O6:Eu2+, Dy3+ phosphors prepared by sol--gel--combustion processing
Huang Ping,Cui Cai-E and Wang Sen.Synthesis and characterization of Sr3Al2O6:Eu2+, Dy3+ phosphors prepared by sol--gel--combustion processing[J].Chinese Physics B,2009,18(10):4524-4531.
Authors:Huang Ping  Cui Cai-E and Wang Sen
Institution:Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China
Abstract:A type of red luminescent Sr3Al2O+:Eu2+, Dy3+ phosphor powder is synthesised by sol--gel--combustion processing, with metal nitrates used as the source of metal ions and citric acid as a chelating agent of metal ions. By tracing the formation process of the sol--gel, it is found that it is necessary to reduce the amount of NO3- by dropping ethanol into the solution for forming a stable and homogeneous sol--gel. Thermogravimetric and Differential Scanning Calorimeter Analysis, x-ray diffractionmeter, scanning electron microscopy and photoluminescence spectroscopy are used to investigate the luminescent properties of the as-synthesised Sr3Al2O6:Eu2+, Dy3+. The results reveal that the Sr3Al2O6 crystallises completely when the combustion ash is sintered at 1250~℃. The excitation and the emission spectra indicate that the excitation broadband lies mainly in a visible range and the phosphors emit a strong light at 618~nm under the excitation of 472~nm. The afterglow of (Sr0.097Eu0.03Dy0.03)3Al2O6 phosphors sintered at 1250~℃ lasts for over 1000 s when the excited source is cut off.
Keywords:Sr3Al2O6:Eu2+  Dy3+ phosphors  red luminescence  sol--gel--combustion method
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