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- W3116753280 abstract "This paper reports on the influence of Pd2+ ions on the ultraviolet emission from Gd3+, investigated in barium phosphate glass as model matrix. The glasses were prepared by the melting technique and characterized by X-ray diffraction (XRD), Fourier transform-infrared (FT-IR) spectroscopy, optical absorption, and photoluminescence (PL) spectroscopy including decay kinetics assessment. The XRD data confirmed the amorphous nature of the glasses, whereas FT-IR spectra indicated the basic structural features of PO4 tetrahedra. The optical absorption analysis showed that addition of PdO up to 0.3 mol% lead to significant growth of the visible Pd2+ d-d absorption band around 415 nm, with ultimately some decrease in the optical band gap energies assessed through Tauc plots. Further, significant PL quenching of Gd3+ ions emission around 312 nm was observed with increasing PdO contents, alongside increased decay rates for the 6P7/2 emitting state in Gd3+. An analysis of quenching constants was ultimately performed comparing results from emission intensity with the decay rates. It is suggested that a Gd3+ → Pd2+ excitation transfer and/or absorption competition lead the quenching process with a contribution from a channel depopulating the 6P7/2 metastable state." @default.
- W3116753280 created "2021-01-05" @default.
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- W3116753280 date "2021-03-01" @default.
- W3116753280 modified "2023-10-15" @default.
- W3116753280 title "Pd2+-induced quenching of the UV emission from Gd3+ ions in phosphate glass" @default.
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- W3116753280 doi "https://doi.org/10.1016/j.saa.2020.119357" @default.
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