Fabrication and luminescent properties of (Y0.99Eu0.01)2O3 transparent nanostructured ceramics

It has been shown that Eu3+ ions act as a luminescent probe in composite (Y0.99Eu0.01)2O3 nanoceramics since their 4f-4f luminescence strongly depends on the crystallographic environment. The luminescence spectra excited in the charge transfer band (CTB) are presented by superposition of emission from europium ions in cubic and monoclinic yttria. A new wide emission band of (Y0.99Eu0.01)2O3 ceramics in the λ = 500-650 nm wavelengths range (λex. = 307 nm) were attributed to luminescence of Eu3+ ions located in perturbed sites at grain boundaries or interfaces.