Preparation and luminescence properties of Ce{sup 3+} and/or Tb{sup 3+} doped LaPO{sub 4} nanofibers and microbelts by electrospinning

Journal Article · Wed Apr 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

OSTI ID:21370328

Zhiyao, Hou ^[1]; Lili, Wang; Hongzhou, Lian; Ruitao, Chai; Cuimiao, Zhang; Ziyong, Cheng ^[2]

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1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China)
2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)

Ce{sup 3+} and/or Tb{sup 3+} doped LaPO{sub 4} 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. Ce{sup 3+} 5d-4f and Tb{sup 3+5}D{sub 4}-{sup 7}F{sub J} (J=6-3) transitions, respectively. The energy transfer process from Ce{sup 3+} to Tb{sup 3+} in LaPO{sub 4}:Ce{sup 3+}, Tb{sup 3+} nanofibers was further studied by the time-resolved emission spectra. Under low-voltage electron beam excitation, LaPO{sub 4}:Ce{sup 3+}, Tb{sup 3+} microbelt phosphors have a higher intensity than that of nanofiber phosphors. - Graphical Abstract: Ce{sup 3+} and/or Tb{sup 3+} LaPO{sub 4} nanofibers and microbelts have been prepared by electrospinning. A systematic study on the optical properties of LaPO{sub 4}:Ce{sup 3+}, Tb{sup 3+} samples has shown that they are good green-emitting phosphors in fluorescent lamps and field emission displays. The energy transfer process from Ce{sup 3+} to Tb{sup 3+} in LaPO{sub 4}:Ce{sup 3+}, Tb{sup 3+} nanofibers is further studied by the time-resolved emission spectra.

• OSTI ID: 21370328
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 4; Other Information: DOI: 10.1016/j.jssc.2008.12.021; PII: S0022-4596(08)00635-X; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CATHODOLUMINESCENCE
CERIUM IONS
DOPED MATERIALS
LANTHANUM PHOSPHATES
NANOSTRUCTURES
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
TERBIUM IONS
TIME RESOLUTION
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
CHARGED PARTICLES
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
EMISSION
IONS
LANTHANUM COMPOUNDS
LUMINESCENCE
MATERIALS
MICROSCOPY
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHOTON EMISSION
RARE EARTH COMPOUNDS
RESOLUTION
SCATTERING
TIMING PROPERTIES