Luminescence, Energy Transfer, and Upconversion Mechanisms of 
Y2O3
Nanomaterials Doped with Eu3+,Tb3+, Tm3+,Er3+, and Yb3+ Ions

Anh, TranKim; Benalloul, Paul; Barthou, Charles; Giang, Lam thiKieu; Vu, Nguyen; Minh, LeQuoc

doi:https://doi.org/10.1155/2007/48247

Journal of Nanomaterials

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Luminescent Nanomaterials

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Research Article | Open Access

Volume 2007 | Article ID 048247 | https://doi.org/10.1155/2007/48247

Luminescence, Energy Transfer, and Upconversion Mechanisms of Y₂O₃ Nanomaterials Doped with Eu³⁺,Tb³⁺, Tm³⁺,Er³⁺, and Yb³⁺ Ions

TranKim Anh,¹Paul Benalloul,²Charles Barthou,²Lam thiKieu Giang,¹Nguyen Vu,¹and LeQuoc Minh^1,3

Academic Editor: Wieslaw Strek

Received21 May 2007

Revised16 Dec 2007

Accepted31 Dec 2007

Published26 Mar 2008

Abstract

Luminescence, energy transfer, and upconversion mechanisms of nanophosphors (Y2O3 : Eu3+, Tb3+, Y2O3 : Tm3+, Y2O3 : Er3+, Yb3+) both in particle and colloidal forms were studied. The structure, phase, and morphology of the nanopowders and nanocolloidal media were determined by high-resolution TEM and X-ray diffraction. It was shown that the obtained nanoparticles have a round-spherical shape with average size in the range of 4 to 20 nm. Energy transfer was observed for Y2O3 : Eu3+, Tb3+ colloidal and powders, upconversion transitions were observed for both Y2O3 : Er3+ and Y2O3 : Er3+, Yb3+ nanophosphors. The dependence of photoluminescence (PL) spectra and decay times on doping concentration has been investigated. The infrared to visible conversion of emission in Y2O3 : Er3+, Yb3+ system was analyzed and discussed aiming to be applied in the photonic technology.

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Copyright © 2007 TranKim Anh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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