Luminescence and electronic excitations in KBe2BO3F2 crystals

被引：0
|
作者：
I. N. Ogorodnikov
V. A. Pustovarov
S. A. Yakovlev
L. I. Isaenko
S. A. Zhurkov
机构：
[1] Yeltsin Ural Federal University (Ural State Technical University-UPI),Sobolev Institute of Geology and Mineralogy
[2] Siberian Branch of the Russian Academy of Sciences,undefined
来源：
Physics of the Solid State | 2012年 / 54卷
关键词：
Electronic Excitation; Photo Luminescence; Exciton Band; Photo Luminescence Spectrum; Exciting Photon Energy;
D O I：
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中图分类号：
学科分类号：
摘要：
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 Eg = 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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页码：735 / 740
页数：5
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