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Journal of Materials Science

Erschienen in:

18.10.2016 | Original Paper

Enormously enhanced upconversion emission in β-NaYF₄:20Yb,2Er microcrystals via Na⁺ ion exchange

verfasst von: Shaohua Fan, Shikai Wang, Wenbin Xu, Meng Li, Hongtao Sun, Lili Hu

Erschienen in: Journal of Materials Science | Ausgabe 2/2017

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Abstract

Efficient upconversion (UC) microcrystals are important for the development of novel photonic markers, solid-state lasers, displays, etc. Herein, we report on greatly enhanced UC emission in β-NaYF₄:20Yb,2Er microcrystals via a simple ion-exchange reaction. The ion exchange accompanying with an ionic redistribution process is demonstrated. By simply controlling the amount of NaF (0–8.0 mmol), reaction temperature (140–220 °C), and duration (0–144 h), enormous enhancement of the UC emission up to ~4200 times is obtained compared with the pre-synthesized β-NaYF₄:20Yb,2Er microcrystals. The decrease of body defects and change of local structure around lanthanide may account for the UC emission enhancement. This method may apply to other UC materials to increase the UC emission efficiency.

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Titel: Enormously enhanced upconversion emission in β-NaYF4:20Yb,2Er microcrystals via Na+ ion exchange
verfasst von: Shaohua Fan
Shikai Wang
Wenbin Xu
Meng Li
Hongtao Sun
Lili Hu
Publikationsdatum: 18.10.2016
Verlag: Springer US
Erschienen in: Journal of Materials Science / Ausgabe 2/2017
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-016-0382-x

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