Charge induced energy fluctuations in thin organic films: effect on charge transport

Abstract

Effect of static charges on transport properties of disordered organic materials is considered. Long range nature of Coulomb interaction requires to consider a transport layer of the finite thickness. Presence of conducting electrodes significantly modifies properties of organic medium, removes a long range Coulomb divergence, and makes it possible to calculate in finite form statistical properties of organic medium (with nonzero total charge density), relevant for transport characteristics. We present also a generalization of ID model of charge carrier transport to the case of inhomogeneous energetic disorder that realizes for the case of charge-induced disorder.