Improvement of precise retrival for charge mobility from charge packet measurements in LLDPE films

Recently, based on our successful exhibition of charge packets phenomenon under a series of electric field intensity (ranges from 10 kV/mm to 50 kV/mm) in LLDPE thin films (500 µm), the retrival of real charge carrier mobility was attempted to work out using numerical methods. To make the migration of charge packets in both numerical simulations and experimental measurements incline to unanimous, a slightly adjusted bipolar charge transport model was adopted for charge packet simulations and a preset electric field-charge migration speed carve was tuned during the iterative simulations. Results show that simulation using this model is qualified for the charge packet reproduction. The simulated charge distribution is more precise than that in former research, and verification simulations basing on the final retrieved carrier mobility carve suit well with the measurement results.