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Structural and Luminescence Properties of Nanocrystalline Eu3+-doped Gd2O3

Published online by Cambridge University Press:  01 February 2011

Segundo Jauregui ,
Oscar Perales-Perez ,
Omar Vasquez ,
W. Jia ,
M. S. Tomar  and
Esteban Fachini
Segundo Jauregui
Affiliation:
[email protected], University of Puerto Rico at Mayaguez, Physics Department, Mayaguez, 00681, Puerto Rico
Oscar Perales-Perez
Affiliation:
[email protected], University of Puerto Rico at Mayaguez, Engineering Science & Materials, Mayaguez, 00680-9044, Puerto Rico
Omar Vasquez
Affiliation:
[email protected], University of Puerto Rico at Mayaguez, Physics Department, Mayaguez, 00681, Puerto Rico
W. Jia
Affiliation:
[email protected], University of Puerto Rico at Mayaguez, Physics Department, Mayaguez, 00681, Puerto Rico
M. S. Tomar
Affiliation:
[email protected], University of Puerto Rico at Mayaguez, Physics Department, Mayaguez, 00681, Puerto Rico
Esteban Fachini
Affiliation:
[email protected], University of Puerto Rico at Rio Piedras, Chemistry Department, San Juan, N/A, Puerto Rico
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Abstract

The present work addresses the synthesis and characterization of red emitting Gd2-xEuxO3 nanocrystalline phosphors by a modified sol-gel based method. The effects of the annealing temperature and atomic fraction of Eu3+ ions, ‘x’, on the structural and luminescence properties of the produced oxides have been systematically investigated. X-ray diffraction analyses revealed that crystalline cubic-Gd2O3 host structure was obtained when the intermediates (x=0.01-0.30) were annealed at different temperatures in air. Photoluminescence spectra of doped Gd2O3 powders showed all transitions of Eu3+ species, being the 5D0→7F2 transition the most intense. On a common sample-weight basis, the highest photoluminescence intensity was obtained at ‘x’ = 0.15. The energy transfer from host to dopant was verified for all evaluated ‘x’ values, which suggest the actual incorporation of Eu species into the Gd-oxide lattice. It was also found that the photoluminescence intensity was strongly dependent on the annealing temperature and dopant concentration.

Keywords

Gdoxideoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1074: Symposium I – Synthesis and Metrology of Nanoscale Oxides and Thin Films , 2008 , 1074-I10-41
Copyright
Copyright © Materials Research Society 2008

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References

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