Abstract
A Y 2O 3–SiO 2 nanocomposite doped with Eu 3+ was obtained by the sol–gel technique and characterized by powder X-ray diffraction, transmission electron microscopy, 29 Si NMR and laser-excited luminescence spectroscopy. It was found that small (2–3 nm) Y 2O 3 nanoparticles, whose size does not appear to change for heat treatments in the range 500–900 °C, interact at the interface with the SiO 2 matrix. Luminescence spectroscopy seems to indicate that the Eu 3+ ion is preferentially located inside the highly disordered Y 2O 3 nanoparticles. These luminescent nanocomposites form a class of materials which could find applications in the field of phosphors.
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