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Comprehensive Studies of Li+ Effect on NaYF4:Yb/Er Nanocrystals: Morphology, Structure, and Upconversion Luminescence

Abstract

Impurity doping plays a critical role in altering the properties of nanomaterials towards designed morphologies and functionalities of target nanomaterials. 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 varies from 0-100 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 ultra-low concentration of 0.5 mol% Li+ doping, as high as 34 times green and 101 times red emission enhancement are achieved.

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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, Accepted Manuscript
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    Comprehensive Studies of 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, Accepted Manuscript , DOI: 10.1039/C7DT01820G

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