Luminescence, energy transfer, and upconversion mechanisms of Y(2)O(3) nanomaterials doped with Eu(3+), Tb(3+), Tm(3+), Er(3+), and Yb(3+) ions

Trankim Anh , Paul Bénalloul (1) , Charles Barthou (1) , Lam Thikieu Giang , Nguyen Vu , Lequoc Minh

1 INSP - Institut des Nanosciences de Paris

Luminescence, energy transfer, and upconversion mechanisms of nanophosphors (Y(2)O(3) : Eu(3+), Tb(3+), Y(2)O(3) : Tm(3+), Y(2)O(3) : Er(3+), Yb(3+)) 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 Y(2)O(3) : Eu(3+), Tb(3+) colloidal and powders, upconversion transitions were observed for both Y(2)O(3) : Er(3+) and Y(2)O(3) : Er(3+), Yb(3+) nanophosphors. The dependence of photoluminescence (PL) spectra and decay times on doping concentration has been investigated. The infrared to visible conversion of emission in Y(2)O(3) : Er(3+), Yb(3+) system was analyzed and discussed aiming to be applied in the photonic technology. Copyright (C) 2007 TranKim Anh et al.

Domaines: Matière Condensée [cond-mat]

Trankim Anh, Paul Bénalloul, Charles Barthou, Lam Thikieu Giang, Nguyen Vu, et al.. Luminescence, energy transfer, and upconversion mechanisms of Y(2)O(3) nanomaterials doped with Eu(3+), Tb(3+), Tm(3+), Er(3+), and Yb(3+) ions. Journal of Nanomaterials, 2007, pp.48247. ⟨10.1155/2007/48247⟩. ⟨hal-01281551⟩