Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Observation of efficient population of the red-emitting state from the green state by non-multiphonon relaxation in the Er3+-Yb3+ system | |
Zhang, J. H.; Z. D. Hao; J. Li; X. Zhang; Y. S. Luo and G. H. Pan | |
2015 | |
发表期刊 | Light-Science & Applications |
卷号 | 4页码:6 |
摘要 | The rare earth Er3+ and Yb3+ codoped system is the most attractive for showcasing energy transfer upconversion. This system can generate green and red emissions from Er3+ under infrared excitation of the sensitizer Yb3+. It is well known that the red-emitting state can be populated from the upper green-emitting state. The contribution of multiphonon relaxation to this population is generally considered important at low excitation densities. Here, we demonstrate for the first time the importance of a previously proposed but neglected mechanism described as a cross relaxation energy transfer from Er3+ to Yb3+, followed by an energy back transfer within the same Er3+-Yb3+ pair. A luminescence spectroscopy study of cubic Y2O3:Er3+, Yb3+ indicates that this mechanism can be more efficient than multiphonon relaxation, and it can even make a major contribution to the red upconversion. The study also revealed that the energy transfers involved in this mechanism take place only in the nearest Er3+-Yb3+ pairs, and thus, it is fast and efficient at low excitation densities. Our results enable a better understanding of upconversion processes and properties in the Er3+-Yb3+ system. |
收录类别 | SCI |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/55522 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Zhang, J. H.,Z. D. Hao,J. Li,et al. Observation of efficient population of the red-emitting state from the green state by non-multiphonon relaxation in the Er3+-Yb3+ system[J]. Light-Science & Applications,2015,4:6. |
APA | Zhang, J. H.,Z. D. Hao,J. Li,X. Zhang,&Y. S. Luo and G. H. Pan.(2015).Observation of efficient population of the red-emitting state from the green state by non-multiphonon relaxation in the Er3+-Yb3+ system.Light-Science & Applications,4,6. |
MLA | Zhang, J. H.,et al."Observation of efficient population of the red-emitting state from the green state by non-multiphonon relaxation in the Er3+-Yb3+ system".Light-Science & Applications 4(2015):6. |
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