Transient Photodischarge Characteristics of Photoconductors with Dispersive Transport

Abstract

The transient photodischarge characteristics in a photoconductor displaying dispersive transport under an open-circuit condition are analyzed numerically. The transport parameters obtained from the present configuration are equivalent to those of a constant-voltage configuration within the small-signal limit. It is shown that, with increasing amounts of charge in transit, the post-transit-time slope of a double-logarithmic |dV(t)/dt| vs time plot increases algebraically, with the pre-transit slope and transit time being largely unaffected. Investigations of the effect of pre-existing trapped space charge indicate that the pre-transit slope depends upon the amount of this space charge. The results point the way to the use of the characteristics for determining transport parameters in a practical xerographic system.