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Structure and Luminescence of Ce-doped Lu2SiO5 Nanophosphor

Published online by Cambridge University Press:  01 February 2011

Michael Wayne Blair ,
Luiz G Jacobsohn ,
Bryan L Bennett ,
Ross E Muenchausen ,
Stephanie C Sitarz ,
James F Smith ,
D Wayne Cooke ,
Peter A Crozier  and
Ruigang Wang
Michael Wayne Blair
Affiliation:
mblair@lanl.gov, Los Alamos National Laboratory, Earth and Environmental Sciences, MS J495, Los Alamos, NM, 87544, United States
Luiz G Jacobsohn
Affiliation:
lgjacob@lanl.gov, Los Alamos National Laboratory, Materials Science & Technology Division, MS E-546, Los Alamos, NM, 87544, United States
Bryan L Bennett
Affiliation:
blbennett@lanl.gov, Los Alamos National Laboratory, Materials Science and Technology, MS E546, Los Alamos, NM, 87545, United States
Ross E Muenchausen
Affiliation:
rossm@lanl.gov, Los Alamos National Laboratory, Materials Science and Technology, MS E546, Los Alamos, NM, 87545, United States
Stephanie C Sitarz
Affiliation:
sitarz@lanl.gov, Los Alamos National Laboratory, Materials Science and Technology, MS E546, Los Alamos, NM, 87545, United States
James F Smith
Affiliation:
jfsmith@lanl.gov, Los Alamos National Laboratory, Materials Science and Technology, MS E546, Los Alamos, NM, 87545, United States
D Wayne Cooke
Affiliation:
wayne1429@aol.com, Los Alamos National Laboratory, Materials Science and Technology, MS E546, Los Alamos, NM, 87545, United States
Peter A Crozier
Affiliation:
crozier@asu.edu, Arizona State University, School of Materials, Tempe, AZ, 85287, United States
Ruigang Wang
Affiliation:
ruigang.wang@asu.edu, Arizona State University, School of Materials, Tempe, AZ, 85287, United States
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Abstract

Nanophosphors correspond to nanostructured inorganic insulator materials that emit light under particle or electromagnetic radiation excitation. In this work we investigate the structure and luminescent properties of Ce-doped Lu2SiO5 (LSO) nanophosphors prepared by solution combustion synthesis with the Ce content 0.1 to 12 at. %. Samples were characterized by transmission electron microscopy (TEM), line scan electron energy-loss spectroscopy (EELS), x-ray diffraction (XRD), and electron paramagnetic resonance (EPR) spectroscopy. Photoluminescence excitation and emission spectra are composed of two major bands centered at 360 and 430 nm, respectively. These results reveal a red-shift and enhanced Stokes shift for the nanophosphors when compared to bulk. Ce content was also found to affect photoluminescence emission intensity and fluorescent lifetime. The nanophosphor concentration quenching curve presents a broad maximum centered at 1 at.%. Lifetime measurements show a continuous decrease from 34 to 21 ns as Ce content is increased.

Keywords

nanostructureluminescencestructural
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH07-06
Copyright
Copyright © Materials Research Society 2008

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References

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