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Reversible vs irreversible photodarkening in a-Se: the kinetics study

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Abstract

The kinetics of photodarkening (PD) in amorphous selenium has been studied experimentally at different intensities of optical excitation. Comparison between the experimental results and a proposed phenomenological model reveals the characteristic rates for conversion of structural units into reversible and irreversible states. Our results show that the relaxation of the irreversible PD states occurs over a barrier of about 0.9 eV and is described by much longer characteristic times (more that one order of magnitude) than that for the reversible states.

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Aknowledgements

Financial support of the Deutsche Forschungsgemeinschaft and that of the Fonds der Chemischen Industrie is gratefully acknowledged.

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Authors and Affiliations

  1. Imaging Research, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Canada, M4N 3M5

    A. Reznik & J. A. Rowlands

  2. Department of Physics and Material Sciences Center, Philipps University Marburg, 35032, Marburg, Germany

    S. D. Baranovskii & O. Rubel

  3. Department of Physics, Ben-Gurion University of Negev, Beer-Sheva, 84105, Israel

    M. Klebanov & V. Lyubin

Authors
  1. A. Reznik
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  2. S. D. Baranovskii
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  3. M. Klebanov
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  4. V. Lyubin
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  5. O. Rubel
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  6. J. A. Rowlands
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Correspondence to A. Reznik.

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Reznik, A., Baranovskii, S.D., Klebanov, M. et al. Reversible vs irreversible photodarkening in a-Se: the kinetics study. J Mater Sci: Mater Electron 20 (Suppl 1), 111–115 (2009). https://doi.org/10.1007/s10854-007-9461-8

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  • DOI: https://doi.org/10.1007/s10854-007-9461-8

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