| Synthesis and characterization of Sr3Al2O6：Eu2＋, Dy3＋ phosphors prepared by sol-gel-combustion processing |
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| 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 |
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| 作者姓名： | 黄平 崔彩娥 王森 |
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| 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 |
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| 基金项目： | Project supported by the KeyResearch Project of Science and Technology of Shanxi, ShanxiProvince, China (Grant No 2007031141), the Natural ScienceFoundation of Shanxi Province, China (Grant No 2007011061), and theScientific Research Foundation of the |
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| 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.
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| 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 |
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| 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 |
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| Authors: | Huang Ping Cui Cai-E Wang Sen |
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| Affiliation: | Department of Physics, Taiyuan University of Technology,Taiyuan 030024, China |
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| Abstract: | A type of red luminescent Sr3Al2O+:Eu2+, Dy3+ phosphor powder is synthesised by sol--gel--combustionprocessing, with metal nitrates used as the source of metal ions andcitric acid as a chelating agent of metal ions. By tracing theformation process of the sol--gel, it is found that it is necessaryto reduce the amount of NO3- by dropping ethanol into thesolution for forming a stable and homogeneous sol--gel.Thermogravimetric and Differential Scanning Calorimeter Analysis,x-ray diffractionmeter, scanning electron microscopy andphotoluminescence spectroscopy are used to investigate theluminescent properties of the as-synthesisedSr3Al2O6:Eu2+, Dy3+. The results revealthat the Sr3Al2O6 crystallises completely when thecombustion ash is sintered at 1250~℃. The excitation and theemission spectra indicate that the excitation broadband lies mainlyin a visible range and the phosphors emit a strong light at 618~nmunder the excitation of 472~nm. The afterglow of(Sr0.097Eu0.03Dy0.03)3Al2O6 phosphorssintered at 1250~℃ lasts for over 1000 s when the excitedsource is cut off. |
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| Keywords: | Sr3Al2O6:Eu2+ Dy3+ phosphors red luminescence sol--gel--combustionmethod |
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