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Issue 28, 2017
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Comprehensive studies of the Li+ effect on NaYF4:Yb/Er nanocrystals: morphology, structure, and upconversion luminescence

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Abstract

Impurity doping plays a critical role in altering the properties of target nanomaterials in terms of designed morphologies, crystal structures, and functionalities. In this work, we have performed a comprehensive investigation of the effect of Li+ doping on the morphology, crystal structure, and upconversion luminescence of NaYF4:Yb/Er nanocrystals. Different Li+ sources, e.g., LiOA and LiOH, were used and the Li+ doping concentration varied from 0 to 100 mol%. The final product changes from hexagonal NaYF4:Yb/Er to the mixture of cubic NaYF4:Yb/Er and tetragonal LiYF4:Yb/Er, and finally to pure tetragonal LiYF4:Yb/Er. More importantly, at an ultra-low concentration of 0.5 mol% Li+ doping, as high as 34 times green and 101 times red emission enhancements are achieved.

Graphical abstract: Comprehensive studies of the Li+ effect on NaYF4:Yb/Er nanocrystals: morphology, structure, and upconversion luminescence

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Publication details

The article was received on 19 May 2017, accepted on 13 Jun 2017 and first published on 13 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT01820G
Citation: Dalton Trans., 2017,46, 8968-8974
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    Comprehensive studies of the Li+ effect on NaYF4:Yb/Er nanocrystals: morphology, structure, and upconversion luminescence

    X. Wang, X. Zhang, Y. Wang, H. Li, J. Xie, T. Wei, Q. Huang, X. Xie, L. Huang and W. Huang, Dalton Trans., 2017, 46, 8968
    DOI: 10.1039/C7DT01820G

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