Role of Correlation on Charge Carrier Transport in Organic Molecular Semiconductors

TL;DR

This paper investigates how spatial and energetic correlations influence charge carrier mobility in organic molecular semiconductors, emphasizing the importance of correlation effects in explaining electrical transport behavior.

Contribution

It provides a comparative analysis of theoretical models, highlighting the significance of correlations in charge transport in disordered organic semiconductors.

Findings

Correlation is crucial for understanding charge transport.

Theoretical models incorporating correlation better explain experimental data.

Mobility depends on electric field and temperature due to hopping conduction.

Abstract

We have investigated the charge carrier transport in organic molecular semiconductors. It has been found that mobility is a function of electric field and temperature due to hopping conduction. Several theoretical models for charge transport in disordered solids have been debated over the role of spatial and energetic correlation in these systems and such correlations have been recently shown to explain the universal electric field dependence of mobility. We have compared and evaluated the applicability of different theoretically proposed models using very simple experimental results and based on our extensive analysis, we have found that correlation is important to explain the electrical transport in these systems.