Tailoring the molecular structure to suppress extrinsic disorder in organic transistors

TL;DR

This paper demonstrates that modifying molecular structures in organic transistors by attaching longer substituents reduces extrinsic disorder and enhances low-temperature mobility without affecting intrinsic properties.

Contribution

It introduces a molecular tailoring strategy to suppress extrinsic disorder in organic transistors, improving performance while maintaining intrinsic transport characteristics.

Findings

Longer core substituents reduce potential fluctuations.

Suppressed disorder leads to increased low-temperature mobility.

Intrinsic transport properties remain unchanged.

Abstract

In organic field-effect transistors, the structure of the constituent molecules can be tailored to minimize the disorder experienced by charge carriers. Experiments on two perylene derivatives show that disorder can be suppressed by attaching longer core substituents - thereby reducing potential fluctuations in the transistor channel and increasing the mobility at low temperature - without altering the intrinsic transport properties.