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Thermal Quenching and Photo-Enhancement of μτ Products in a-Si:H - The Role of Dangling Bonds and Band Tails

Published online by Cambridge University Press:  16 February 2011

E. Morgado
E. Morgado*
Affiliation:
Technical University of Lisbon, Centro de Física Molecular, Av. Rovisco Pais, Complexo I - IST, 1000 Lisboa, Portugal
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Abstract

Results from numerical calculations with a recombination model involving one class of correlated dangling-bond states and exponential band tails, in a-Si:H, are reported. Fermi level, light intensity and temperature dependences of the μτ products are studied. The results are consistent with experimental data. It is found that photo-enhancement of (μτ)e, or superlinear photoconductivity, as well as thermal quenching, are associated with a capture cross section of the band tails smaller than the capture cross sections of the dangling-bond states.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 336: Symposium A – Amorphous Silicon Technology - 1994 , 1994 , 419
Copyright
Copyright © Materials Research Society 1994

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