Determination of charge carrier mobility in doped low density polyethylene using DC transients

Charge carrier mobility was determined for plain and doped low-density polyethylene (LDPE) using DC transient currents. Barium titanate was used as a strongly polar dopant and titanium dioxide as a semiconductor dopant. The values of the mobility obtained were on the order of 10^-10 cm² v^-1 s^-1. Results indicate that the inclusion of 1% by weight of BaTiO₃ and TiO₂ has a considerable effect on the conduction properties of the polymer. BaTiO₃ increased the charge carrier mobility by a factor of three and also increased the conductivity of the polymer. TiO₂ increased the charge carrier mobility by a factor of five. Charge trapping and space charge formation were modified by the introduction of titanium dioxide