Abstract
A solution based hydrothermal synthesis at 200C followed by calcinations at 900C was used for the preparation of Y0.99-xPO4:Ybx/Er0.01 (x=0.10, 0.30, 0.50) nanoparticles. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and upconversion luminescence (UCL) spectra. All the samples were assigned as the tetragonal YPO4 phase. Under near-infrared laser excitation, the upconversion luminescence was observed, where the intensity increased with an increase in the Yb3+ doping content (x), indicating that Yb3+ acted as a sensitizer, which transfer the energy of near-infrared excitation to Er3+ illuminant.
