Observation of efficient population of the red-emitting state from the green state by non-multiphonon relaxation in the Er3+-Yb3+ system

	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.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Zhang-2015-Observati（2150KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览请求全文