S Le Roy et al 2004 J. Phys. D: Appl. Phys. 37 298 doi:10.1088/0022-3727/37/2/020
Description of bipolar charge transport in polyethylene using a fluid model with a constant mobility: model prediction
S Le Roy1, P Segur2, G Teyssedre1 and C Laurent1
Show affiliationsWe present a conduction model aimed at describing bipolar transport and space charge phenomena in low density polyethylene under dc stress. In the first part we recall the basic requirements for the description of charge transport and charge storage in disordered media with emphasis on the case of polyethylene. A quick review of available conduction models is presented and our approach is compared with these models. Then, the bases of the model are described and related assumptions are discussed. Finally, results on external current, trapped and free space charge distributions, field distribution and recombination rate are presented and discussed, considering a constant dc voltage, a step-increase of the voltage, and a polarization–depolarization protocol for the applied voltage. It is shown that the model is able to describe the general features reported for external current, electroluminescence and charge distribution in polyethylene.
- PACS
- Subjects
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Soft matter, liquids and polymers
- Dates
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Issue 2 (21 January 2004)
Received 8 September 2003
Published 19 December 2003
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Description of bipolar charge transport in polyethylene using a fluid model with a constant mobility: model prediction
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