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- W4243295516 abstract "Abstract We report the synthesis and characterization of cubic NaGdF 4 :Yb/Tm@NaGdF 4 :Mn core–shell structures. By taking advantage of energy transfer through Yb→Tm→Gd→Mn in these core–shell nanoparticles, we have realized upconversion emission of Mn 2+ at room temperature in lanthanide tetrafluoride based host lattices. The upconverted Mn 2+ emission, enabled by trapping the excitation energy through a Gd 3+ lattice, was validated by the observation of a decreased lifetime from 941 to 532 μs in the emission of Gd 3+ at 310 nm ( 6 P 7/2 → 8 S 7/2 ). This multiphoton upconversion process can be further enhanced under pulsed laser excitation at high power densities. Both experimental and theoretical studies provide evidence for Mn 2+ doping in the lanthanide‐based host lattice arising from the formation of F − vacancies around Mn 2+ ions to maintain charge neutrality in the shell layer." @default.
- W4243295516 created "2022-05-12" @default.
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- W4243295516 date "2015-09-11" @default.
- W4243295516 modified "2023-10-11" @default.
- W4243295516 title "Energy Migration Upconversion in Manganese(II)‐Doped Nanoparticles" @default.
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- W4243295516 doi "https://doi.org/10.1002/ange.201507176" @default.
- W4243295516 hasPublicationYear "2015" @default.
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