| 氟化物纳米晶体中Tm3+对Eu3+的荧光增强效 |
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| 引用本文： | 雷瑜,郑海荣,田宇,崔敏,高当丽,何恩节,张喜生.氟化物纳米晶体中Tm3+对Eu3+的荧光增强效[J].科学通报,2010,55(11):978-983. |
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| 作者姓名： | 雷瑜 郑海荣 田宇 崔敏 高当丽 何恩节 张喜生 |
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| 作者单位： | 陕西师范大学物理学与信息技术学院; |
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| 基金项目： | 国家自然科学基金(批准号:10875075);;陕西省自然科学基金(批准号:SJ08-ZT13)资助项目 |
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| 摘 要： | 采用水热-烧结法制备了性能良好的Eu3+ /Tm3+共掺LaF3和LaOF 纳米晶体. 在波长为532 nm的激光激发下, 实现了共掺样品中Tm3+对Eu3+的荧光增强效应. 结果发现, 当三价稀土离子Tm3+作为敏化剂被共掺到LaF3:Eu3+和LaOF:Eu3+纳米晶体中时, 掺杂 Eu3+的荧光发射得到了显著的增强, 其增强倍数与Tm3+离子的浓度密切相关. 与单掺 Eu3+离子的LaOF:Eu3+纳米晶体相比较, Tm3+离子的掺入可使氟化物纳米晶体中原本已经很强的5D0→7F2(612 nm)红色荧光辐射又增强了一个数量级, 从而获得拥有良好颜色纯度和极高辐射强度的红色荧光纳米材料. 依据实验观测结果和晶体结构对称性特点, 研究了共掺体系中荧光增强的产生机理以及局域对称性变化对于荧光强度的影响.
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| 关 键 词： | 纳米晶体 荧光辐射 荧光增强 |
| 收稿时间： | 2009-10-11 |
The enhancement effect of Tm~(3+) on the fluorescence emission of Eu~(3+) in fluoride nanoparticles |
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| LEI Yu,ZHENG HaiRong,TIAN Yu,CUI Min,GAO DangLi,He EnJie & Zhang XiSheng.The enhancement effect of Tm~(3+) on the fluorescence emission of Eu~(3+) in fluoride nanoparticles[J].Chinese Science Bulletin,2010,55(11):978-983. |
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| Authors: | LEI Yu ZHENG HaiRong TIAN Yu CUI Min GAO DangLi He EnJie & Zhang XiSheng |
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| Institution: | College of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China |
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| Abstract: | Fluoride nanoparticles of LaF3 and LaOF co-doped with Tm3+ and Eu3+ ions were prepared with hydrothermal technique. A great fluorescence enhancement of Tm3+ to Eu3+ was observed when the samples were excited with 532 nm laser. It was found that the enhancement factor of red fluorescence emission of Eu3+ ions depended on the concentration of Tm3+ when it was co-doped as a sensitizer. Comparing with the strong fluorescence emission from LaOF:Eu3+ nanoparticles at 612 nm, we found that up to ten times enhancem... |
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| Keywords: | fluorescence emission fluorescence enhancement |
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