Solvothermal synthesis and upconversion properties of about 10 nm orthorhombic LuF3: Yb3+, Er3+ rectangular nanocrystals

	Solvothermal synthesis and upconversion properties of about 10 nm orthorhombic LuF3: Yb3+, Er3+ rectangular nanocrystals
	Xiang, G. T.; J. H. Zhang; Z. D. Hao; X. Zhang; G. H. Pan; L. Chen; Y. S. Luo; S. Z. Lu and H. F. Zhao
	2015
发表期刊	Journal of Colloid and Interface Science
卷号	459 页码:224-229
摘要	The Yb3+ and Er3+ codoped orthorhombic LuF3 rectangular nanocrystals (NCs) with the size of about 10 nm were synthesized by a facile and effective solvothermal process. X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), upconversion (UC) luminescence spectra and decay curves were used to characterize the resulting samples. Compared with YF3 and alpha-NaYF4 NCs, owning the similar size and the same doping levels of Yb3+ ions and Er3+ ions as LuF3 NCs, the green UC emission of LuF3 NCs is 18.7 times and 5.1 times stronger than that of YF3 and of alpha-NaYF4 NCs respectively; the red UC emission of LuF3 NCs is 13.2 times and 0.6 times stronger than that of YF3 and alpha-NaYF4 NCs respectively. Under 980 nm wavelength excitation, the decay curves of both S-4(3/2) -> I-4(15/2) transition and F-4(9/2) -> I-4(15/2) transition exhibit a single exponential function, resulting from the fast energy migrations among Yb3+ ions caused by the high concentration of Yb3+ ions (20 mol%). Meanwhile, at relatively low power density, the slopes of the linear plots between log(I) and log(P) for green UC and red UC are 1.7 and 1.9 respectively, which are less than 2 due to the quenching of the thermal effect, indicating a two-photon process for them. At high power density, the slopes are decreased caused by the saturation effect. In addition, we proved the existence of the thermal effect. by the pump power dependence of the intensity ratio of H-2(11/2) -> I-4(15/2) transition to S-4(3/2) -> I-4(15/2) transition. (C) 2015 Elsevier Inc. All rights reserved.
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55482
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Xiang, G. T.,J. H. Zhang,Z. D. Hao,et al. Solvothermal synthesis and upconversion properties of about 10 nm orthorhombic LuF3: Yb3+, Er3+ rectangular nanocrystals[J]. Journal of Colloid and Interface Science,2015,459:224-229.
APA	Xiang, G. T..,J. H. Zhang.,Z. D. Hao.,X. Zhang.,G. H. Pan.,...&S. Z. Lu and H. F. Zhao.(2015).Solvothermal synthesis and upconversion properties of about 10 nm orthorhombic LuF3: Yb3+, Er3+ rectangular nanocrystals.Journal of Colloid and Interface Science,459,224-229.
MLA	Xiang, G. T.,et al."Solvothermal synthesis and upconversion properties of about 10 nm orthorhombic LuF3: Yb3+, Er3+ rectangular nanocrystals".Journal of Colloid and Interface Science 459(2015):224-229.

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