Eu~(3+)-Doped Y_2O_3-SiO_2 Nanocomposite Obtained by a Sol-Gel Method

摘要

A Y_2O_3SiO_2 nanocomposite doped with Eu~(3+) was obtained by a sol-gel method and characterized by X-ray diffraction, IR, ~(29)Si NMR and laser-excited luminescence spectroscopy. It was found that small (2-3 nm) yttria nanoparticles are homogeneously dispersed in, and interacting with, the amorphous silica matrix. Luminescence spectroscopy indicates that the Eu~(3+) ion is preferentially located inside or at the surface of highly disordered Y_2O_3 nanoparticles. These luminescent nanocomposites form a class of materials which could find applications in the field of phosphors.