NDLI: Er$^{3+}$ doped BaYF$_{5}$ nanofibers: facile construction technique, structure and upconversion luminescence

Content Provider	Springer Nature Link
Author	Liu, Yue Li, Dan Ma, Qianli Dong, Xiangting Xi, Xue Yu, Wengsheng Wang, Xinlu Wang, Jinxian Liu, Guixia
Copyright Year	2016
Abstract	Er$^{3+}$ doped BaYF$_{5}$ nanofibers have been successfully fabricated by electrospinning combined with a double-crucible fluorination method we recently proposed. For the fabrication process, the first step is to prepare PVP/[Ba(CH$_{3}$COO)$_{2}$ + Y(NO$_{3}$)$_{3}$ + Er(NO$_{3}$)$_{3}$] composite nanofibers via electrospinning, the next step is calcining the composite nanofibers into mixed oxide nanofibers in air, and finally BaYF$_{5}$:Er$^{3+}$ nanofibers are successfully synthesized by fluorination of the as-prepared mixed oxide nanofibers used as precursor via a double-crucible method applying NH$_{4}$HF$_{2}$ as fluorinating agent. X-ray diffractometry analysis reveals that BaYF$_{5}$:Er$^{3+}$ nanofibers are pure tetragonal phase with space group of P/421m. The diameter of BaYF$_{5}$:Er$^{3+}$ nanofibers is 109.9 ± 10.9 nm under the 95 % confidence level. Upconversion emission spectra analysis manifests that BaYF$_{5}$:Er$^{3+}$ nanofibers emit strong green and weak red upconversion emissions centering at 522 ($^{2}$H$_{11/2}$ → $^{4}$I$_{15/2}$), 540 ($^{4}$S$_{3/2}$ → $^{4}$I$_{15/2}$) and 651 ($^{4}$F$_{9/2}$ → $^{4}$I$_{15/2}$) nm, respectively. Moreover, the emitting colors of BaYF$_{5}$:Er$^{3+}$ nanofibers are located in the green region in CIE chromaticity coordinates diagram. The optimum doping molar concentration of Er$^{3+}$ ions is found to be 5 %. The formation mechanism of the BaYF$_{5}$:Er$^{3+}$ nanofibers is also studied. This preparation technique can be applied to fabricate other rare earth fluoride nanofibers.
Starting Page	5277
Ending Page	5283
Page Count	7
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	27
Issue Number	5
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2016-02-03
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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