Self-consistent model of unipolar transport in organic semiconductor diodes: accounting for a realistic density-of-states distribution

TL;DR

This paper presents a self-consistent model for unipolar charge transport in organic diodes that incorporates realistic density-of-states and trap states, validated against experimental data.

Contribution

It introduces a novel mean-field model that accounts for realistic density-of-states and trap states in organic semiconductors, improving understanding of charge injection and transport.

Findings

Model accurately predicts charge transport behavior.

Good agreement with experimental I-V characteristics.

Highlights importance of density-of-states in device performance.

Abstract

A self-consistent, mean-field model of charge-carrier injection and unipolar transport in an organic semiconductor diode is developed utilizing the effective transport energy concept and taking into account a realistic density-of-states distribution as well as the presence of trap states in an organic material. The consequences resulting from the model are discussed exemplarily on the basis of an indium tin oxide/organic semiconductor/metallic conductor structure. A comparison of the theory to experimental data of a unipolar indium tin oxide/poly-3-hexyl-thiophene/Al device is presented.