中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4524-4531.doi: 10.1088/1674-1056/18/10/071

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Synthesis and characterization of Sr3Al2O6:Eu2+, Dy3+ phosphors prepared by sol--gel--combustion processing

黄平, 崔彩娥, 王森   

  1. Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China
  • 收稿日期:2008-12-11 修回日期:2009-04-15 出版日期:2009-10-20 发布日期:2009-10-20
  • 基金资助:
    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

Synthesis and characterization of Sr3Al2O6:Eu2+, Dy3+ phosphors prepared by sol--gel--combustion processing

Huang Ping(黄平), Cui Cai-E(崔彩娥)†, and Wang Sen(王森)   

  1. Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2008-12-11 Revised:2009-04-15 Online:2009-10-20 Published:2009-10-20
  • Supported by:
    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

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摘要： 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.

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.

Key words: Sr3Al2O6:Eu2+, Dy3+ phosphors, red luminescence, sol--gel--combustion method

中图分类号:  (Sol-gel processing, precipitation)

  • 81.20.Fw
61.43.Gt (Powders, porous materials) 78.55.Hx (Other solid inorganic materials) 81.20.Ev (Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation) 81.20.Ka (Chemical synthesis; combustion synthesis) 81.70.Pg (Thermal analysis, differential thermal analysis (DTA), differential thermogravimetric analysis)