| Synthesis and spectral characteristics of La2MoO6：Ln3＋ （Ln=Eu, Sm, Dy, Pr, Tb） polycrystals |
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| 作者姓名： | MENG Fangui ZHANG Xinmin LI Huan Hyo Jin Seo |
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| 作者单位： | [1]College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China [2]Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea |
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| 基金项目： | Foundation item： Project Sponsored by the Scientific Research Fotmdation for the Returned Overseas Chinese Scholars, State Education Ministry （2011-508）, Technology Program of Hunan Provincial Department of Housing and Urban-Rural Development （201020）, Science and Technology Program of Hunan Province （2011GK3223）, and the Industrial Strategic Technology Development Program （10037416） funded by the Ministry of Knowl- edge Economy （MKE, Korea） |
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| 摘 要： | The novel phosphors of La 2 MoO 6 activated with the trivalent rare earth Ln 3+ (Ln=Eu, Sm, Dy, Pr, Tb) ions were synthesized by solid state reactions at high temperature in air atmosphere, and their phase impurities and luminescent properties were studied. The photoluminescence (PL) excitation and emission spectra, and decay curves were employed to study their luminescence properties. The lifetimes of the characteristic emissions from Ln 3+ ions were in the order of millisecond except Pr 3+ ions. (LaEu 1-x ) 2 MoO 6 was a promising phosphor for practical application and the optimum concentration was x=0.075. The concentration quenching mechanism of Eu 3+ was also discussed by theoretical fitting using Burshtein model.
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| 关 键 词： | photoluminescence phosphors La 2 MoO 6 rare earths |
| 收稿时间： | 3 February 2012 |
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