Author/Authors :
Song، نويسنده , , Hongwei and Chen، نويسنده , , Baojiu and Sun، نويسنده , , Baojuan and Zhang، نويسنده , , Jisen and Lu، نويسنده , , Shaozhe، نويسنده ,
Abstract :
Ultraviolet light-irradiation induced spectral change was studied in cubic nanocrystalline Y2O3:Eu3+. Under the irradiation of the ultraviolet lights separated from xenon lamp, the excited charge transfer band of Eu3+ decreased after irradiation. The smaller the particle size and the shorter the wavelength, the larger the spectral change. It was attributed to the local structural change surrounding Eu3+ ions in/near the surface. Under the irradiation of the 266-nm pulsed laser, some Eu3+ in nanoparticles was reduced to Eu2+.
