Synthesis, Structural and Luminescent Properties of Gd_2O_3-SiO_2:Eu~(3+) Nanopowder Composites

摘要

In view of the improvement of luminescent intensity in classical phosphors, different new techniques of synthesis have been developed. One of them is the sol-gel technique for nanopowder synthesis. Applied to a binary system Gd_2O_3-SiO_2 doped with trivalent europium ion, very fine powder form samples have been obtained. In that case the emission intensity of ~5D_0→F_2 electronic transition of 4f~6 configuration is greatly enhanced compared to the bulk oxide. The lifetime measurements are given too. The size of nanoparticles is of about 10 nm, determined by dynamic light scattering and XRD analysis.