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Persistent Photoconductivity, the Staebler-Wronski Effect, and Long-Range Disorder in a-Si:H

Published online by Cambridge University Press:  15 February 2011

D. Quicker ,
P. W. West  and
J. Kakalios
D. Quicker
Affiliation:
School of Physics and Astronomy, University of Minnesota, Minneapolis MN 55455
P. W. West
Affiliation:
School of Physics and Astronomy, University of Minnesota, Minneapolis MN 55455
J. Kakalios
Affiliation:
School of Physics and Astronomy, University of Minnesota, Minneapolis MN 55455
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Abstract

We report measurements of the conductivity, thermopower, and conductance fluctuations before and after light exposure for a-Si:H samples that show either persistent photoconductivity (PPC) or a Staebler-Wronski effect. Both the conductivity and thermopower are changed by light exposure, but no change is observed in the difference between the conductivity and thermopower activation energies for any of the samples studied here. This suggests that the long-range disorder is unaffected by light exposure. For some samples, the magnitude or statistical properties of the conductance fluctuations are affected by light exposure. We compare these results to previous studies of the Staebler-Wronski effect and discuss their implications for models of the light-induced changes and the 1/f noise in a-Si:H.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 467: Symposium A – Amorphous and Microcrystalline Silicon Technology - 1997 , 1997 , 73
Copyright
Copyright © Materials Research Society 1997

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