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In this work, we investigate the effect of BaF2 on the structural and optical properties of Er3+/Yb3+ co-doped fluoro-tellurite glasses prepared by the melt quenching technique. Good thermal stability and low phonon energy of this glassy system were found using differential scanning calorimetry and Raman spectroscopy, respectively. Infrared measurements showed a significant shift of infrared longwave...
In order to evaluate the quantum efficiency of the cooperative energy transfer (CET) process in the Bi3+–Yb3+ co-doped Gd2O3 phosphor, direct measurements of external quantum yield (QY) were performed along with studies of photoluminescence (PL), photoluminescence excitation (PLE) and photoluminescence decay kinetics. The absolute QY measurements reveal considerable discrepancy between the measured...
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