Selective synthesis of LaF3 and NaLaF4 nanocrystals via lanthanide ion doping

Content Provider	Semantic Scholar
Author	Shen, Yuxing Zhang, Xi Wang, Xiuwen Liu, Botong Wang, Yangbo Xie, Xiaoji Huang, Ling Huang, Wei
Copyright Year	2017
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 material 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, investigations of the doping effect of different lanthanide ions on the formation of the final product were carried out. The experimental results have indicated that Ce3+ and Pr3+ doping has no obvious effect on the product compared to pure β-LaF3 nanocrystals without doping, and 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 a mixture of both. What is more, proper lanthanide ion doping can also help in obtaining 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.
Starting Page	9188
Ending Page	9193
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1039/C7TC02362F
Volume Number	5
Alternate Webpage(s)	http://www.rsc.org/suppdata/c7/tc/c7tc02362f/c7tc02362f1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C7TC02362F
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article