The influence of a spatially non-homogeneous trap distribution on the transient currents in insulating layers at high fields

Abstract

In this paper the influence of a spatially non-homogeneous trap distribution on the transient currents in insulating layers for high fields, weak injection and fast trapping is discussed. Two approximate solutions to the transport equations are obtained by including a non-homogeneous trap distribution in the previous formulation of Arnett (P. C. Arnett), J. Appl. Phys., 46 (1975) 5236); the discharge of the layer is also considered. The spatial behaviour of the trap density is assumed to be exponential and this is applied to the solutions obtained. Formulae relating the trap distribution parameters to electrically measurable quantities are proposed.