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- W2316004142 abstract "The time-resolved luminescence and luminescence excitation spectra, and luminescence decay kinetics at 8 and 300 K of Lu3A15O12 (LuAG) single-crystal films doped with Sc3+ and La3+ isoelectronic impurities and excited by synchrotron radiation are investigated. It is established that the La3+ isoelectronic impurity in the ⨑ub;c⫂ub; positions of the garnet lattice forms La Lu 3+ luminescence centers emitting in the band with λmax = 280 nm and the decay time of the main component τ = 300 ns at 300 K. The Sc3+ isoelectronic impurity located in the ⨑ub;c⫂ub; and (a) positions of the LuAG lattice forms two luminescence centers, Sc Lu 3+ and Sc Al 3+ , emitting in the bands with λmax = 290 nm and τ = 240 ns and λmax = 335 nm and τ = 375 ns, respectively, at 300 K. It is shown that the luminescence excitation of the La3+ and Sc3+ isoelectronic impurities in LuAG single-crystal films occurs through radiative decay of excitons localized near La Lu 3+ , Sc Lu 3+ , and Sc Al 3+ centers. The energies of formation of these excitons are determined to be 6.8, 6.88, and 7.3 eV, respectively. It was found that the excited state of the excitons genetically related to the La Lu 3+ , Sc Lu 3+ , and Sc Al 3+ enters has two radiative levels with different transition probabilities. This configuration leads to the presence of fast (2.3–8.4 ns) and slow (150–375 ns) main components in the luminescence of the centers formed by isoelectronic impurities in garnets." @default.
- W2316004142 created "2016-06-24" @default.
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- W2316004142 date "2006-04-01" @default.
- W2316004142 modified "2023-10-18" @default.
- W2316004142 title "Luminescence of Sc3+ and La3+ isoelectronic impurities in Lu3Al5O12 single-crystal films" @default.
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- W2316004142 doi "https://doi.org/10.1134/s0030400x06040138" @default.
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