| Инд. авторы: | Ogorodnikov I.N., Pustovarov V.A., Yakovlev S.A., Isaenko L.I., Zhurkov S.A. |
| Заглавие: | A time-resolved luminescence spectroscopy study of non-linear optical crystals K 2Al 2B 2O 7 |
| Библ. ссылка: | Ogorodnikov I.N., Pustovarov V.A., Yakovlev S.A., Isaenko L.I., Zhurkov S.A. A time-resolved luminescence spectroscopy study of non-linear optical crystals K 2Al 2B 2O 7 // Journal of Luminescence. - 2012. - Vol.132. - Iss. 7. - P.1632-1638. - ISSN 0022-2313. - EISSN 1872-7883. |
| Внешние системы: | DOI: 10.1016/j.jlumin.2012.02.032; SCOPUS: 2-s2.0-84857551218; |
| Реферат: | eng: We report the results of complex study of luminescence and dynamics of electronic excitations in K 2Al 2B 2O 7 (KABO) crystals obtained using low-temperature luminescence-optical vacuum ultraviolet spectroscopy with sub-nanosecond time resolution under selective photoexcitation with synchrotron radiation. The paper discusses the decay kinetics of photoluminescence (PL), the time-resolved PL emission spectra (1.26.2 eV), the time-resolved PL excitation spectra and the reflection spectra (3.721 eV) measured at 7 K. On the basis of the obtained results three absorption peaks at 4.7, 5.8 and 6.5 eV were detected and assigned to charge-transfer absorption from O 2- to Fe 3+ ions; the intrinsic PL band at 3.28 eV was revealed and attributed to radiative annihilation of self-trapped excitons, the defect luminescence bands at 2.68 and 3.54 eV were separated; the strong PL band at 1.72 eV was revealed and attributed to a radiative transition in Fe 3+ ion. © 2012 Elsevier B.V.
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| Ключевые слова: | Ultraviolet spectroscopy; Photoexcitation; Excited states; Emission spectroscopy; Defects; Crystal defects; Charge transfer; Aluminum; Vacuum ultraviolet spectroscopy; Time-resolved luminescence spectroscopy; Time-resolved; Time resolution; Self-trapped exciton; Reflection spectra; Radiative transitions; Radiative annihilation; PL excitations; PL emission; Luminescence; Nonlinear optical crystal; Nonlinear crystals; Luminescence spectra; Luminescence excitation spectra; Luminescence decay kinetics; Low temperatures; Electronic excitation; Defect luminescence; Decay kinetics; Charge-transfer absorption; Absorption peaks; Nonlinear crystal; Luminescence spectra; Luminescence excitation spectra; Luminescence decay kinetics; K 2Al 2B 2O 7 (KABO); Defects; PL bands; |
| Издано: | 2012 |
| Физ. характеристика: | с.1632-1638 |