Behavior of trapped electronic excitations in oxide crystals

The transient optical absorption spectra and their decay kinetics have been investigated by time-resolved absorption spectroscopy technique in Zn-doped BeO crystals. Comparing transient optical absorption properties of self-trapped excitons (STEs) and Zn-impuritytrapped excitons we have made conclus...

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Bibliographic Details
Published in:Radiation effects and defects in solids 1999-11, Vol.150 (1-4), p.95-101
Main Authors: Gorbunov, S. V., Bautin, K. V., Kudyakov, S. V., Kruzhalov, A. V., Ivanov, Yu. V., Yakovlev, Yu. V.
Format: Article
Language:English
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Summary:The transient optical absorption spectra and their decay kinetics have been investigated by time-resolved absorption spectroscopy technique in Zn-doped BeO crystals. Comparing transient optical absorption properties of self-trapped excitons (STEs) and Zn-impuritytrapped excitons we have made conclusions about the similarity of their hole components and distinctive peculiarties of forbidden optical transitions in their electron components. The metastable optical absorption of Zn + -centers has been first found. It is shown that the Zn-impurity-trapped excition formation occurs at the hole stages of recombination thermotunnel processes with the participation of electron Zn + -centers. It is found that high probability of electron and hole center recombination formed in BeO-Zn crystals by electron pulses may be related to a high degree of their space correlation.
ISSN:1042-0150
1029-4953
DOI:10.1080/10420159908226214