The study of anti-Stokes photoluminescence properties in the Y2O3: Er3+ nanocrystals
YZr2OZr3:Er3+纳米晶anti-Stokes发光性质的研究

The homogeneous precipitation method was used for preparing nanocrystalline erbium doped Y 2O 3 with various molar concentrations. These materials synthesized in the system were characterized with XRD, SEM micrograph and PL spectra. Stokes and anti Stokes PL emissions of Y 2O 3:Er 3 nanocrystals were investigated, whose intensities were varied evidently with a range of dopant erbium ions concentration. When the molarity of dopant erbium ions is close to 2 0%, the relative intensities of anti Stokes PL spectra are dominant. From the XRD and SEM micrograph, the Y 2O 3:Er 3 nanocrystal with cubic structure is verified and the distribution of particles size is homogeneous. The experimental results indicate that the anti Stokes emission results from two photon absorption process in the Y 2O 3:Er 3 nanocrystal system.