Luminescence and electronic excitations in crystals K<Subscript>2</Subscript>Al<Subscript>2</Subscript>B<Subscript>2</Subscript>O<Subscript>7</Subscript> with defects期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Luminescence and electronic excitations in crystals K2Al2B2O7 with defects

Authors:	I. N. Ogorodnikov V. A. Pustovarov S. A. Yakovlev L. I. Isaenko S. A. Zhurkov

Affiliation:	1.Yeltsin Ural Federal University,Yekaterinburg,Russia;2.Sobolev Institute of Geology and Mineralogy, Siberian Branch,Russian Academy of Science,Novosibirsk,Russia

Abstract:	This paper reports on the results of the comprehensive study of the dynamics of electronic excitations in K₂Al₂B₂O₇ (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 K₂Al₂B₂O₇ crystals have been discussed.

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