文摘
Yb2O3:Ho3+ nanocrystalline powders were synthesized through a solid state reaction method. X-ray diffraction analysis and field emission scanning electron microscopy were used to analyze the phase composition and morphology of the powders. Then under the 980xA0;nm excitation of laser diode, the fluorescence of the crystals was studied via a fluorescence spectrometer. The green and red emissions centered on 551 and 668xA0;nm were observed, and the green band dominated the emission spectrum. The effect of the concentration of Ho3+ on the upconversion luminescence intensity was discussed and the possible upconversion emission mechanism was explained. It indicates that like other metal oxide nanoparticles, Yb2O3 could also be a potential host material for doping to prepare the upconversion phosphor.