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- W4387212909 abstract "TeO2 based glasses containing silver and doped by erbium ions were synthesized via the melting-quenching process. These glasses were subjected to an annealing treatment during different times above the glass temperature transition Tg. Transmission electron microscope (TEM) and X-ray diffraction (XRD) revealed the growth of silver nanoparticles inside the tellurite glass host. Raman analysis was conducted to examine the structural characteristics of the glass systems and to detect any effects brought by the heat-treatment. Using 488 nm excitation, the down-conversion luminescence properties of erbium ions were studied and the processes implicated in the near-infrared emission (NIR) at 1530 nm were analysed. It was found that the heat-treatment enhanced the Raman signal and the downconversion emission of Er3+ ions. Especially, annealing for long time (at 440°C) resulted in an improvement of NIR emission intensity to the detriment of green emissions, as well as a considerable enhancement in the quantum yield and measured lifetime of the 1530 nm emission. The results indicate that the proposed glasses could be appropriate down-converting materials for improving the spectral response of some photovoltaic (PV) cells having bandgaps in the range 0.7–0.9eV." @default.
- W4387212909 created "2023-10-01" @default.
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- W4387212909 date "2023-12-01" @default.
- W4387212909 modified "2023-10-12" @default.
- W4387212909 title "Effect of Ag nanoparticles growth on the downconversion emissions of erbium in TeO2-Nb2O5-ZnO-Ag2O glass system" @default.
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- W4387212909 doi "https://doi.org/10.1016/j.jnoncrysol.2023.122658" @default.
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