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- W1597884074 abstract "This work deals with the identification of In+ ions in octahedral symmetry and the study of their optical properties in crystalline Rb2KInF6:Ce3+ and Rb2KInF6:Tb3+. The presence of In+ ions in the sites of In3+ has been confirmed exciting the Ce3+-doped sample at 41 600 and 32 360 cm−1 and exciting the Tb3+-doped sample at 41 600 cm−1. An hypothesis based on the In3+–Ce3+ and In3+–Tb3+ redox couples for the Ce3+- and Tb3+-doped elpasolite-type fluoroindates has been proposed in order to explain the presence of In+ at the mentioned excitation energies. This redox process is more efficient for the In3+–Ce3+ couple than for the In3+–Tb3+ one. Emission spectra and luminescence decays of In+ have been investigated at 5–300 K in both samples under the above mentioned excitations. Our experimental results have been compared to those obtained for In+-type ions as In+, Ga+, and Tl+ in alkali halides in literature. The transitions between the 5s5p excited configuration and the 5s2 configuration of In+ ions modified by the elpasolite matrix in Oh symmetry explain the optical data, if we take into account the spin-orbit coupling and Jahn–Teller effect (JTE). Finally, an additional fluorescence has been found in the Tb3+-doped sample; it has been assigned to In+ ions in potassium sites." @default.
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- W1597884074 date "1999-11-01" @default.
- W1597884074 modified "2023-10-17" @default.
- W1597884074 title "Luminescence of In+ in Ce3+ and Tb3+-doped elpasolite-type fluoroindates" @default.
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- W1597884074 doi "https://doi.org/10.1063/1.371477" @default.
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