Investigation of up/down-converted luminescence and related mechanisms in Ho3+/Yb3+ co-doped Y2Zr2O7 highly transparent ceramics as phosphor material

Via solid state reaction, Ho3+/Yb(3+ )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 ultra-violet (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+/Yb(3+ )co-doped Y2Zr2O7 (YZO) transparent ceramics are promising novel phosphor material under different circumstance.

Automated summary

Ho3+/Yb3+ co-doped Y2Zr2O7 transparent ceramics were successfully prepared via solid state reaction. The ceramics exhibited excellent optical properties and high temperature resistance, and showed strong green emission under excitation of UV and NIR.