Luminescent characteristics of layered yttrium oxide nano-phosphors doped with europium

摘要

The luminescence and structural properties of layered Y_2O_3：Eu~(3+) phosphors, synthesized by a simple evaporation method followed by thermal annealing at temperatures up to 1100°C, are described for a europium doping concentration of 4.3 at. % as determined by energy dispersive spectroscopy. The intense luminescence emission spectra of these samples are associated with the characteristic intra-electronic energy levels of Eu~(3+) ion transitions. The dominant emission peak is at 611 nm, corresponding to the ~5D_0 to ~7F_2 transition, and the dominant excitation peak is at λ_(e×c) — 245 nm. A layered morphology was observed in these phosphors by both transmission and scanning electron microscopy studies. The samples have a cubic crystalline structure.