Trapping Effect on Electrical Behavior of Polyester Film. II: Bipolar Injection

Abstract

The time evolution of conduction current J_c(t) determined experimentally, in polyethylene terephthalate, at 373 K, was simulated by using a bipolar charge (electrons and holes) model with injecting electrodes including dipoles with the relaxation time τ and a discrete set of localized levels with a density N_t. The numerical calculation showed that the J_c(t) characteristics are significantly affected by the carrier charge motion and depend on the model parameters.

Keywords:

• Bipolar carriers
• Conduction response
• Polar polymer
• Polyethylene terephthalate
• Traps

Acknowledgments

The firm Rhône Poulenc is thanked for providing us with PET samples.