Journal
JOURNAL OF LUMINESCENCE
Volume 124, Issue 1, Pages 39-44Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2006.01.360
Keywords
Y2O3 : Eu3+; electrospinning; fibers; luminescent properties
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Sub-micrometer-sized fibers of europium-doped yttria (Y2O3:Eu3+) were prepared by electrospinning followed by high-temperature calcinations for the first time. The fibers were with diameters of 200-400 nm and lengths of several 10 mu m and cubic in phase. The spectral properties of the Y2O3:Eu3+ fibers were studied, in contrast with those of bulk powders. The results indicated that in the present Y2O3:Eu3+ fibers the excited charge transfer band had slightly blue shift in comparison with that in the bulk due to weaker covalence of Eu-O bonds. In addition, both of the lifetimes of the D-5(1) and D-5(0) states in the fibers became shorter than that in the bulk due to improved nonradiative transition rates. (c) 2006 Elsevier B.V. All rights reserved.
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