Abstract
Via solid state reaction, Ho3+/Yb3+ co-doped Y2Zr2O7 (YZO) transparent ceramics with different ytterbium concentration were successfully prepared. Highest in-line transmittance of samples reaches over 75% in both visible and near-infrared region. The homogeneity and microstructure of powders and ceramics were investigated through XRD and SEM characterizations. The luminescence results show that under excitation at ultraviolet (UV) and near-infrared (NIR) source, strong green emission peaks were observed and corresponding energy-conversion mechanism such as cooperative energy transfer (CET) were applied to explain the transition mechanism. Combined with the excellent optical properties and high temperature resistance, these results suggest that Ho3+/Yb3+ co-doped Y2Zr2O7 (YZO) transparent ceramics are promising novel phosphor material under different circumstance.
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