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Selective Synthesis of LaF3 and NaLaF4 Nanocrystals via Lanthanide Ion Doping

Abstract

The capability to selectively obtain expected nanocrystals from a series of possibilities with similar chemical compositions has been a long-term challenge. β-LaF3 and β-NaLaF4 nanocrystals are a kind of host materials with excellent physical and chemical stability as well as low phonon energy. Since β-NaLaF4 nanocrystals are difficult to form due to the very strong La3+-F- ionic bond, inventigations of the doping effect of different lanthanide ions on the final product formation were carried out. The experimental results have indicated that Ce3+ and Pr3+ doping has no obvious difference on the product compared to pure β-LaF3 nanocrystals without doping, doping of Nd3+, Sm3+, Eu3+, Gd3+, and Tb3+ leads to the formation of pure β-NaLaF4 nanocrystals while doping of Dy3+, Ho3+, Er3+, Tm3+, Yb3+, and Lu3+ only results in the mixture of both. What is more, proper lanthanide ion doping can also help to obtain enhanced up- and downconversion luminescence. A theoretical model from the nanocrystal growth free energy point of view has been developed to explain the above phenomenon.

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Publication details

The article was received on 30 May 2017, accepted on 30 Jul 2017 and first published on 03 Aug 2017


Article type: Paper
DOI: 10.1039/C7TC02362F
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Selective Synthesis of LaF3 and NaLaF4 Nanocrystals via Lanthanide Ion Doping

    L. Nie, Y. Shen, X. Zhang, X. Wang, B. Liu, Y. Wang, Y. Pan, X. Xie, L. Huang and W. Huang, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC02362F

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