| Abnormal Visible Luminescence Mechanism of Tb^3＋-Yb^3＋ Codoped SiOu-Al2O3-CaF2 Glass Studied by Time-Resolved Spectra |
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| 引用本文： | 段倩倩,;赵华,;张治国,;菅傲群,;桑胜波,;张文栋.Abnormal Visible Luminescence Mechanism of Tb^3＋-Yb^3＋ Codoped SiOu-Al2O3-CaF2 Glass Studied by Time-Resolved Spectra[J].中国物理快报,2014(8):151-154. |
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| 作者姓名： | 段倩倩 ;赵华 ;张治国 ;菅傲群 ;桑胜波 ;张文栋 |
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| 作者单位： | [1]MicroandNano-systemResearchCenter,CollegeofInformationEngineering,T~iyuanUniversityofTechnology,Taiyuan030024; [2]KeyLaboratoryofAdvancedTransducersandIntelligentControl(ShanxiProvinceandMinistryofEducation),TaiyuanUniversityofTechnology,Taiyuan030024; [3]SchoolofMaterialsScienceandEngineering,HarbinInstituteofTechnology,Harbin150001; [4]CondensedMatterScienceandTechnologyInstitute,HarbinInstituteofTechnology,Harbin150001 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 91123036 and 51105267, the Basic Research Priorities Program of Shanxi Province for Youths under Grant No 2012021013-1, the Shanxi Scholarship Council of China under Grant No 2010-030, the Science and Technology Major Project of the Shanxi Science and Technology Department under Grant No 20121101004, and the Key Disciplines Construction in Colleges and Universities of Shanxi Province under Grant No [2012]45. |
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| 摘 要： | The upconversion energy transfer mechanism in Tb^3＋-Yb^3＋ co-doped SiO2-Al2O3-CaF2 glass is investigated by time-resolved spectra. The effect of donor ion Yb^3＋ is involved in the dynamic decay behavior of acceptor ion Tb^3＋, which provides direct proof for the energy transfer from Yb^3＋ to Tb^3＋. The pump power dependence curves show that the upconversion luminescence is a two-photon process. The measured decay curves of the 5D4 state （Tb^3＋） contain two parts： a slow decay process corresponding to its radiation, and a fast one with a decay parameter approximately twice the lifetime of the ^2F5/2 state （Yb^3＋ ）. The fast decay process is contradictory to the generally accepted cooperative sensitization upconversion rate equation model. Since the effect of the host environmental is excluded by comparative experiments, we believe that there should be another energy transfer mechanism in Tb^3＋-Yb^3＋ co-doped SiO2-Al2O3-CaF2 glass in addition to the cooperative sensitization process.
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| 关 键 词： | 时间分辨光谱 发光机制 共掺杂 氟化钙 氧化铝 玻璃 能量传递机理 上转换发光 |
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