Near-Infrared to Visible Upconversion in Er3+ and Yb3+ Codoped Lu2O3 Nanocrystals: Enhanced Red Color Upconversion and Three-Photon Process in Green Color Upconversion

	Near-Infrared to Visible Upconversion in Er3+ and Yb3+ Codoped Lu2O3 Nanocrystals: Enhanced Red Color Upconversion and Three-Photon Process in Green Color Upconversion
其他题名	论文其他题名
	Li Y. P.; Zhang J. H.; Zhang X.; Luo Y. S.; Ren X. G.; Zhao H. F.; Wang X. J.; Sun L. D.; Yan C. H.
	2009
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	113 期号:11 页码:4413-4418
摘要	The synthesis and upconversion luminescence properties upon a 980 nm pump of cubic Lu1.88Yb0.1Er0.02O3 nanocrystals with various shapes, e.g., nanorods, nanosheets, and nanoparticles, are studied. It is observed that with decreasing size of the nanocrystals, the relative intensity of the upconverted red emission (Er3+ : F-4(9/2) -> I-4(15/2)) to the green one (Er3+: (H-2(11/2), S-4(3/2)) -> I-4(15/2)) is increased, and a three-photon process involved in the green upconversion, as described by F-4(9/2) (Er) + F-2(5/2) (Yb) -> H-2(9/2) (Er) + F-2(7/2) (Yb), is synchronously enhanced. An analysis based on steady-state rate equations indicates that the results can be induced by a large I-4(11/2) -> I-4(13/2) nonradiative relaxation rate with a small F-4(9/2) -> I-4(9/2) nonradiative relaxation rate. The large I-4(11/2) -> I-4(13/2) nonradiative relaxation rate is attributed to the occurrence of efficient cross energy transfer to OH- surface group due to the good energy match. As the size of the nanocrystals decreases, the relative surface area is increased, increasing the number of OH- group that can attach to the surface, therefore, enhancing the I-4(11/2) -> I-4(13/2) nonradiative relaxation rate through cross energy transfer to OH- surface group.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26263
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li Y. P.,Zhang J. H.,Zhang X.,et al. Near-Infrared to Visible Upconversion in Er3+ and Yb3+ Codoped Lu2O3 Nanocrystals: Enhanced Red Color Upconversion and Three-Photon Process in Green Color Upconversion[J]. Journal of Physical Chemistry C,2009,113(11):4413-4418.
APA	Li Y. P..,Zhang J. H..,Zhang X..,Luo Y. S..,Ren X. G..,...&Yan C. H..(2009).Near-Infrared to Visible Upconversion in Er3+ and Yb3+ Codoped Lu2O3 Nanocrystals: Enhanced Red Color Upconversion and Three-Photon Process in Green Color Upconversion.Journal of Physical Chemistry C,113(11),4413-4418.
MLA	Li Y. P.,et al."Near-Infrared to Visible Upconversion in Er3+ and Yb3+ Codoped Lu2O3 Nanocrystals: Enhanced Red Color Upconversion and Three-Photon Process in Green Color Upconversion".Journal of Physical Chemistry C 113.11(2009):4413-4418.

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