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High Field Limitation of Poole-Frenkel Emission Caused by Tunneling

Published online by Cambridge University Press:  10 February 2011

S. D. Ganichev ,
E. Ziemann ,
W. Prettl ,
A. A. Istratov  and
E. R. Weber
S. D. Ganichev
Affiliation:
Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany, e-mail: [email protected] A. F. loffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
E. Ziemann
Affiliation:
Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany, e-mail: [email protected]
W. Prettl
Affiliation:
Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany, e-mail: [email protected]
A. A. Istratov
Affiliation:
Dept. of Materials Science, University of California, Berkeley CA 94720
E. R. Weber
Affiliation:
Dept. of Materials Science, University of California, Berkeley CA 94720
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Abstract

The electric field dependence of emission of carriers from deep impurities in semiconductors has been investigated applying static and terahertz electric fields. It is shown that at high electric field strengths carrier emission is dominated by phonon assisted tunneling which may easily be recognized by plotting the emission rate as a function of the square of the electric field strength in a log-lin plot giving a straight line. For charged impurities the transition from phonon assisted tunneling to Poole-Frenkel effect at low fields can be traced back.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 560: Symposium E – Luminescent Materials , 1999 , 239
Copyright
Copyright © Materials Research Society 1999

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References

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