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Steady-state and time-resolved emission and excitation spectra as well as luminescence decay kinetics are studied at 4.2–400K under excitation in the 3–6eV energy range for Bi3+ ions substituting for Y3+ ions in four inequivalent crystal lattice sites of Y4Al2O9:Bi ceramics. Luminescence characteristics of Bi3+ centers of all the four types are identified and are shown to arise from the radiative...
Time-resolved emission and excitation spectra as well as luminescence decay kinetics are studied at 4.2–400 K under excitation in the 3–6 eV energy range for Bi3+ ions substituting for Y3+ ions in four nonequivalent crystal lattice sites of Y4Al2O9:Bi ceramics. The dependences of the luminescence characteristics and the relaxed excited state structure of Bi3+centers on their nearest surroundings are...
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