期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 182, 期 4, 页码 698-708出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.12.021
关键词
Electrospinning; LaPO4 nanofiber; LaPO4 microbelt; Phosphor
资金
- National Basic Research Program of China [2007CB935502]
- National Natural Science Foundation of China [50702057, 50872131, 00610227]
Ce3+ and/or Tb3+ doped LaPO4 nanofibers and microbelts have been prepared by a combination method of sol-gel process and electrospinning. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), photoluminescence (PL), low voltage cathodoluminescence (CL) and time-resolved emission spectra as well as kinetic decays were used to characterize the resulting samples. SEM and TEM results indicate the as-formed precursor fibers and belts are smooth. and the as-prepared nanofibers and microbelts consist of nanoparticles. The doped rare-earth ions show their characteristic emission under ultraviolet excitation, i.e. Ce3+ 5d-4f and Tb3+ D-5(4)-F-7(j) (J = 6-3) transitions, respectively. The energy transfer process from Ce3+ to Tb3+ in LaPO4:Ce3+, Tb3+ nanofibers was further studied by the time-resolved emission spectra. Under low-voltage electron beam excitation. LaPO4:Ce3+, Tb3+ microbelt phosphors have a higher intensity than that of nanofiber phosphors. (C) 2008 Elsevier Inc. All rights reserved.
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