XRPD data for one of the samples studied in this work ( of doped yttrium silicate powder). The Rietveld fitting is shown in red along with the experimental data (black dots) and identified phases.
The luminescence of doped yttrium silicate powder obtained under UV excitation.
Energy levels diagram of the cooperative UC process between pairs of and . The dotted arrows represent the ET channel.
The UC luminescence from codoped yttrium silicate powder obtained under near-IR excitation .
UC luminescence dynamics and fitting curve for one of the samples studied.
The structural parameters of the -doped and -codoped yttrium silicate powders. Indexed phases with less than 1% of total crystalline weight fraction were not included.
UV excited luminescence intensity ratio between transitions and , JO intensity parameters , luminescence lifetime , radiative and nonradiative transitions, and luminescence quantum efficiency for yttrium silicate and yttrium oxide powders doped with of and prepared by CS.
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