Luminescence and electronic excitations in crystals [K.sub.2][Al.sub.2][B.sub.2][O.sub.7] with defects

This paper reports on the results of the comprehensive study of the dynamics of electronic excitations in [K.sub.2][Al.sub.2][B.sub.2][O.sub.7] (KABO) crystals, obtained by low-temperature luminescence vacuum ultraviolet spectroscopy with nanosecond time resolution upon photoexcitation by synchrotro...

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Bibliographic Details
Published in:Physics of the solid state 2012-01, Vol.54 (1), p.111
Main Authors: Ogorodnikov, I.N, Pustovarov, V.A, Yakovlev, S.A, Isaenko, L.I, Zhurkov, S.A
Format: Article
Language:English
Subjects:
Nuclear radiation
Photoluminescence
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Summary:This paper reports on the results of the comprehensive study of the dynamics of electronic excitations in [K.sub.2][Al.sub.2][B.sub.2][O.sub.7] (KABO) crystals, obtained by low-temperature luminescence vacuum ultraviolet spectroscopy with nanosecond time resolution upon photoexcitation by synchrotron radiation. For the first time, the data have been obtained on the photoluminescence (PL) decay kinetics, PL spectra with time resolution, PL excitation spectra with time resolution, and reflection spectra at 7 K; the intrinsic nature of PL at 3.28 eV has been established; luminescence bands of defects have been separated in the visible and ultraviolet spectral regions; an intense long-wavelength PL band has been detected at 1.72 eV; channels of the formation and decay of electronic excitations in [K.sub.2][Al.sub.2][B.sub.2][O.sub.7] crystals have been discussed.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783412010258