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Models of bipolar charge transport in polyethylene

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journal contribution
posted on 16.04.2013, 15:42 by F. Boufayed, G. Teyssèdre, C. Laurent, S. Le Roy, Len A. Dissado, P. Ségur, G.C. Montanari
We introduce and develop two bipolar transport models which are based on appreciably different physical assumptions regarding the distribution function in the energy levels of trap states. In the first model, conduction is described by an effective mobility of the carriers and the accumulation of stored space charge is taken into account through a single trapping level. In the second model the hypothesis of an exponential distribution function of trap depth is made, with conduction taking place via a hopping process from site to site. The results of simulations of the two models are compared with experimental data for the external current and the space-time evolution of the electrical space charge distribution. The two descriptions are evaluated in a critical way, and the prospects for these models to adequately describe real systems are given.

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Citation

Journal of Applied Physics, 2006, 100 (10), pp. 4105-14 (10)

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Version

VoR (Version of Record)

Published in

Journal of Applied Physics

Publisher

American Institute of Physics (AIP)

issn

0021-8979

eissn

1089-7550

Copyright date

2006

Available date

16/04/2013

Publisher version

http://jap.aip.org/resource/1/japiau/v100/i10/p104105_s1

Language

en

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