Charge Transport in Non-Diluted Conjugated Polymers

TL;DR

This paper introduces a unified theoretical approach to model charge transport in non-diluted conjugated polymers, explaining differences in mobility and activation energy across various device conditions.

Contribution

It presents a novel calculation method for variable range hopping transport considering charge concentration and electric field variations, and proposes a way to extract charge density of states.

Findings

Explains differences in mobility between high and low concentration regimes.

Provides a method to determine charge carrier density of states from transport data.

Unifies understanding of transport properties in conjugated polymers.

Abstract

We present a unified calculation method for variable range hopping transport with a varying charge concentration and a varying applied electrical field. We demonstrate that the major differences between the transport properties measured at high concentration and low concentration can be explained within this framework. In particular the difference between the measured mobility, and mobility activation energy in polymer field effect transistors and polymer light emitting diodes is explained. A theoretical method to extract the charge carrier density of state from the transport measurements of non-diluted materials is proposed.