Author/Authors :
Jia، نويسنده , , Mingli and Zhang، نويسنده , , Jiahua and Lu، نويسنده , , Shaozhe and Sun، نويسنده , , Jiangting and Luo، نويسنده , , Yongshi and Ren، نويسنده , , Xinguang and Song، نويسنده , , Hongwei and Wang، نويسنده , , Xiao-jun، نويسنده ,
Abstract :
Increases of emission intensities for Eu3+ at the S6 site relative to that at the C2 site have been observed as UV excitation wavelength decreases from 300 to 200 nm in both bulk and nanocrystalline cubic Y2O3:Eu3+. Analysis of excitation spectra suggests that the energy transfer from the host prefers to the S6 site. In addition, spectral red-shift has been found in both charge transfer bands in nanocrystalline Y2O3:Eu3+ compared to the bulk material. The number ratio of S6 sites to C2 sites is also smaller in nanocrystalline Y2O3:Eu3+ than that in the bulk one.
