| Broadband downconversion in YVO4：Tm3＋,Yb3＋ phosphors |
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| 引用本文： | 姜桂铖,韦先涛,陈永虎,段昌奎,尹民.Broadband downconversion in YVO4：Tm3＋,Yb3＋ phosphors[J].中国稀土学报(英文版),2013,31(1):27-31. |
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| 作者姓名： | 姜桂铖 韦先涛 陈永虎 段昌奎 尹民 |
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| 作者单位： | Department of Physics,University of Science and Technology of China |
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| 基金项目： | Project supported by the National Key Basic Research Program of China (2013CB921800);the National Natural Science Foundation of China (11074245, 11204292, 11274299);the Fundamental Research Funds for the Central Universities (WK2030020022) |
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| 摘 要： | An efficient near-infrared (NIR) downconversion (DC) by converting broadband ultraviolet (UV) into NIR was demonstrated in YVO4:Tm3+,Yb3+ phosphors. The phosphors were extensively characterized using various methods such as X-ray diffraction, photoluminescence excitation, photoluminescence spectra and decay lifetime to provide supporting evidence for DC process. Upon UV light varying from 260 to 350 nm or blue light (473 nm) excitation, an intense NIR emission of Yb3+ corresponding to transition of 2F5/2→2F7/2 peaking at 985 nm was generated. The visible emission, the NIR mission and the decay lifetime of the phosphors of various Yb3+ concentrations were investigated. Experimental results showed that the energy transfer from vanadate group to Yb3+ via Tm3+ was very efficient. Application of the broadband DC YVO4:Tm3+,Yb3+ phosphors might greatly enhance response of siliconbased solar cells.
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| 关 键 词： | YVO4 荧光粉 下变频 宽带 光致发光光谱 镱 衰减寿命 X射线衍射 |
| 收稿时间： | 28 June 2012 |
Broadband downconversion in YVO4:Tm3+,Yb3+ phosphors |
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| JIANG Guicheng , WEI Xiantao, CHEN Yonghu , DUAN Changkui , YIN Min.Broadband downconversion in YVO4:Tm3+,Yb3+ phosphors[J].Journal of Rare Earths,2013,31(1):27-31. |
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| Authors: | JIANG Guicheng WEI Xiantao CHEN Yonghu DUAN Changkui YIN Min |
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| Affiliation: | * (Department of Physics, University of Science and Technology of China, Hefei 230026, China) |
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| Abstract: | An efficient near-infrared (NIR) downconversion (DC) by converting broadband ultraviolet (UV) into NIR was demonstrated in YVO4:Tm3+,Yb3+ phosphors. The phosphors were extensively characterized using various methods such as X-ray diffraction, photoluminescence excitation, photoluminescence spectra and decay lifetime to provide supporting evidence for DC process. Upon UV light varying from 260 to 350 nm or blue light (473 nm) excitation, an intense NIR emission of Yb3+ corresponding to transition of 2F5/2→2F7/2 peaking at 985 nm was generated. The visible emission, the NIR mission and the decay lifetime of the phosphors of various Yb3+ concentrations were investigated. Experimental results showed that the energy transfer from vanadate group to Yb3+ via Tm3+ was very efficient. Application of the broadband DC YVO4:Tm3+,Yb3+ phosphors might greatly enhance response of silicon-based solar cells. |
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| Keywords: | downconversion YVO4：Tm3＋ yb3＋ energy transfer rare earths |
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