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- W2076753945 abstract "Abstract A barium-phosphate glass matrix was co-doped with SnO and Eu 2 O 3 for investigating on material luminescent properties. Optical absorption and X-ray photoelectron spectroscopy (XPS) were employed in the characterization of tin species. The prevalence of divalent tin was indicated by the XPS data in accord with a conspicuous absorption band detected around 285 nm ascribed to twofold-coordinated Sn centers (isoelectronic with Sn 2+ ). Photoluminescence (PL) excitation spectra obtained by monitoring Eu 3+ emission from the 5 D 0 state revealed a broad excitation band from about 250 to 340 nm, characteristic of donor/acceptor energy transfer. Under excitation of such at 290 nm, the co-doped material exhibited a bright whitish luminescence, and a four-fold enhanced Eu 3+ emission relative to a purely Eu-doped reference. Time-resolved PL spectra recorded under the excitation at 290 nm exposed a broad band characteristic of the twofold-coordinated Sn centers and emission bands of Eu 3+ ions, which appeared well separated in time in accord with their emission decay dynamics. The data suggested that light absorption took place at the Sn centers (donors) followed by energy transfer to Eu 3+ ions (acceptors) which resulted in populating the 5 D 0 emitting state. Energy transfer pathways likely resulting in the enhanced Eu 3+ photoluminescence and the consequential light emission were discussed." @default.
- W2076753945 created "2016-06-24" @default.
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- W2076753945 date "2015-01-01" @default.
- W2076753945 modified "2023-10-16" @default.
- W2076753945 title "Origin of light emission and enhanced Eu3+ photoluminescence in tin-containing glass" @default.
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- W2076753945 doi "https://doi.org/10.1016/s1002-0721(14)60378-1" @default.
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