| LiZnPO4：Tb^3＋,Ce^3＋ green phosphors with high efficiency |
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| 作者姓名： | 欧阳春梅 马帅 饶阳 周新木 周雪珍 李永绣 |
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| 作者单位： | Research Center for Rare Earths ＆ Micro/Nano-Functional Materials, Nanchang University, Jiangxi 330031, China |
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| 基金项目： | Project supported by National High Technology Research and Development Program of China, 863 Program （2010AA03A407, 2010AA03A408） and the Foundation of Training Academic and Technical Header for Main Majors of Jiangxi of China （2007GG00800）. |
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| 摘 要： | Tb3+ and Ce3+ co-activated LiZnPO4 phosphors with high luminescence efficiency were synthesized by a high temperature solid-state reaction at 1000 oC for 3 h. The XRD patterns, photoluminescence spectra and SEM were recorded and the effects of Tb3+ and Ce3+ concentration, sintering condition on the luminescent properties of as-synthesized phosphors were investigated. The emission spectra under ultraviolet (200-300 nm) radiation showed a dominant peak at 543 nm attributed to the 5D4→7F5 transition of Tb3+, which was greatly en-hanced by the co-doping of Ce3+, indicating that there occurred an efficient non-radiative energy transfer from Ce3+ to Tb3+. The optimal dop-ing concentrations of Tb3+ and Ce3+ were determined to be 9% and 10%, respectively.
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| 关 键 词： | green phosphor high luminescence efficiency LiZnPO4:Tb3+,Ce3+ rare earths |
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