Author/Authors :
Wei-Wei، نويسنده , , Zhang and Mei، نويسنده , , Xu and Wei-Ping، نويسنده , , Zhang and Min، نويسنده , , Yin and Ze-Ming، نويسنده , , Qi and Shang-Da، نويسنده , , Xia and Garapon، نويسنده , , Claudine، نويسنده ,
Abstract :
Nanocrystalline Y2O3:Eu of cubic crystal structure with different particle size was prepared by combustion reaction. High-resolution electron microscope images and extended X-ray absorption fine structure (EXAFS) analysis of the nanoscale samples indicate defected crystalline particles and co-existence of an amorphous phase. Novel emission bands centered at 613 and 622 nm with a lifetime of 0.4 ms emerge in nanoscale Y2O3:Eu. Site-selective spectra and time-resolved spectra show that the novel emission bands are from the amorphous phase in nanoscale samples.
