Abstract
Er3+/Yb3+-codoped Gd2O3 phosphors have been synthesized by combustion method and solid-state reaction method. The prepared phosphors were compared for their structural, morphological, and optical properties. The phosphor prepared by combustion method is of monoclinic phase, whereas the phosphor formed by solid-state reaction method is of cubic phase. The structural properties were carried out by PXRD analysis. The crystallinity and morphology of the prepared phosphors were evaluated by SEM and TEM analysis, and the parameters are in good relation to PXRD results. All of the phosphors prepared by both of the methods are found to be in the nanometer range. The particle size is higher in the phosphor prepared by solid-state reaction method. The upconversion spectra of the phosphor were compared under 980 nm excitation. The luminescence behavior was studied as a function of activator and sensitizer concentrations and excitation power.
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