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Luminescence and electronic excitations in KBe2BO3F2 crystals

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Abstract

This paper reports on a study of the dynamics of electronic excitations in KBe2BO3F2 (KBBF) crystals by low-temperature luminescent vacuum ultraviolet spectroscopy with nanosecond time resolution under photoexcitation by synchrotron radiation. The first data have been obtained on the kinetics of photoluminescence (PL) decay, time-resolved PL spectra, time-resolved PL excitation spectra, and reflection spectra at 7 K; the estimation has been performed for the band gap E g = 10.6−11.0 eV; the predominantly excitonic mechanism for PL excitation at 3.88 eV has been identified; and defect luminescence bands at 3.03 and 4.30 eV have been revealed. The channels of generation and decay of electronic excitations in KBBF crystals have been discussed.

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Authors and Affiliations

  1. Yeltsin Ural Federal University (Ural State Technical University-UPI), ul. Mira 19, Yekaterinburg, 620002, Russia

    I. N. Ogorodnikov, V. A. Pustovarov & S. A. Yakovlev

  2. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia

    L. I. Isaenko & S. A. Zhurkov

Authors
  1. I. N. Ogorodnikov
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  2. V. A. Pustovarov
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  3. S. A. Yakovlev
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  4. L. I. Isaenko
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  5. S. A. Zhurkov
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Correspondence to I. N. Ogorodnikov.

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Original Russian Text © I.N. Ogorodnikov, V.A. Pustovarov, S.A. Yakovlev, L.I. Isaenko, S.A. Zhurkov, 2012, published in Fizika Tverdogo Tela, 2012, Vol. 54, No. 4, pp. 691–696.

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Ogorodnikov, I.N., Pustovarov, V.A., Yakovlev, S.A. et al. Luminescence and electronic excitations in KBe2BO3F2 crystals. Phys. Solid State 54, 735–740 (2012). https://doi.org/10.1134/S106378341204018X

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  • DOI: https://doi.org/10.1134/S106378341204018X

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