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- Title
YOS:Yb, Er nanofibers: novel fabrication technique, structure and up-conversion luminescent characteristics.
- Authors
Lu, Xin; Yang, Ming; Yang, Liying; Ma, Qianli; Dong, Xiangting; Tian, Jian
- Abstract
YO:Yb, Er nanofibers were prepared by calcination of the electrospun polyvinyl pyrrolidone (PVP)/[Y(NO) + Yb(NO) + Er(NO)] composite nanofibers. For the first time, YOS:Yb, Er up-conversion luminescent nanofibers were successfully synthesized via inheritance of the morphology and sulfurization of the above electrospinning-derived YO:Yb, Er nanofibers using sulfur powders as sulfur source by a double-crucible method we newly proposed. XRD analysis indicates that YOS:Yb, Er nanofibers are pure hexagonal in structure with space group $$ {\text{P}}\overline{ 3} m 1 $$ . Observation results of FESEM and TEM reveal that the diameters of YOS:Yb, Er nanofibers are 105 ± 13 nm, and YOS:Yb, Er nanofibers are composed of nanoparticles with the diameter ranging from 40 to 70 nm. Up-conversion emission spectrum analysis manifests that YOS:Yb, Er nanofibers exhibit strong green and red upconversion emission centering at 526, 548 and 668 nm, respectively. The green emissions and the red emission are respectively assigned to H/S → I and F → I energy levels transitions of Er ions. The formation mechanism of YOS:Yb, Er upconversion luminescence nanofibers is also proposed. More importantly, this new strategy and fabrication technique are of universal significance to prepare other rare earth oxysulfides with various morphologies.
- Subjects
YTTRIUM oxides; EUROPIUM spectra; NANOFIBERS; NANOSTRUCTURED materials synthesis; NANOFABRICATION; LUMINESCENCE; X-ray diffraction
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 6, p4078
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-2947-x