| 氟化物中Yb3+对Ho3+, Tm3+的直接敏化上转换作用 |
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| 引用本文： | 张向华,刘政威,肖思国.氟化物中Yb3+对Ho3+, Tm3+的直接敏化上转换作用[J].光谱学与光谱分析,2005,25(5):660-664. |
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| 作者姓名： | 张向华 刘政威 肖思国 |
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| 作者单位： | 湘潭大学材料与光电物理学院,湖南,湘潭,411105 |
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| 基金项目： | 国家"863"项目(2002AA324030), 湖南省教育厅优秀青年教师基金(03B039); 湖南省自然科学基金(04JJ3041)资助 |
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| 摘 要： | 采用双掺杂(Yb^3 ／Ho^3 )和多掺杂(Ho^3 ／Yb^3 ／Tm^3 )方式，研究了氟化物中Yb^3 对Ho^3 ，Tm^3 的直接敏化上转换作用，并对它们在980nm激光激发下的上转换光谱特性进行了比较，对它们的上转换机理作了详细的讨论分析。观测到两处很强的上转换发光，分别是Yb^3 ／Ho^3 共掺杂体系中^5F4^5S2(Ho^3 )→^5Is(Ho^3 )的荧光跃迁和Ho^3 ／Yb^3 ／Tm^3 共掺杂体系中^3H4(Tm^3 )→H6(Tm^3 )的荧光跃迁。还发现由于添加了Tm^3 ，减弱了Yb^3 ／Ho^3 共掺杂体系中Ho^3 在可见光范围的上转换发光强度。
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| 关 键 词： | 直接上转换敏化作用 氟化物 荧光 |
| 文章编号： | 1000-0593(2005)05-0660-05 |
| 修稿时间： | 2003年12月16 |
Direct Sensitization Up-Conversion Mechanism from Yb3+ to Ho3+ and Tm3+ in Fluoride |
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| Zhang Xiang-hua,LIU Zheng-wei,XIAO Si-guo.Direct Sensitization Up-Conversion Mechanism from Yb3+ to Ho3+ and Tm3+ in Fluoride[J].Spectroscopy and Spectral Analysis,2005,25(5):660-664. |
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| Authors: | Zhang Xiang-hua LIU Zheng-wei XIAO Si-guo |
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| Abstract: | The direct sensitization up-conversion processes from Yb3+ to Ho3+ and Tm3+ in fluoride were studied. The properties of the up-converted spectra of Yb3+ /Ho3+ and Ho3+ /Yb3+ /Tm3+ co-doped fluorides pumped by a 980 nm laser were compared. Their up-conversion mechanism has been analyzed and discussed. Two strong up-conversion luminescence bands have been observed, which were the transitions of 5 F4 5 S2 (Ho3+) -->18 (Ho3+) in the Yb3+ /Ho3+ co-doped fluoride system and 3 H4 (Tm3+) --> 3 H6 (Tm3+) in the Ho+ /Yb3+ /Tm3+ co-doped fluoride system. The addition of Tm3+ into Yb3+ /Ho3+ co-doped fluoride decreases the up-converted emission intensities of Ho3+ in the visible region. |
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| Keywords: | Direct sensitization up-conversion Fluoride Luminescence |
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