Organic Field-Effect Transistors

Illustration of our research into dual-gated polymer devices for independently controlling electronic and ionic charge to study non-equilibrium transport.

Using dual-gated polymer devices, we freeze the counterion distribution while independently tuning the carrier density to study non-equilibrium electron-ion transport. This allows us to probe the Coulomb gap under controlled conditions and reveal how conductivity and thermopower can be enhanced.

Illustration of our research into ion-exchange doping of conducting polymers to control carrier density and improve charge transport.

Using ion-exchange doping, we investigate how carrier density, counterion identity and polymer microstructure govern charge transport in conducting polymers. This helps us understand how doping alters structural and dynamic disorder, and how these effects can be controlled to improve conductivity.

Graphs illustrating our research into separating contact resistance from intrinsic charge transport in tin halide perovskite field-effect transistors.

Using field-effect transistors, we investigate charge transport in metal halide perovskites and other emerging semiconductors. By separating intrinsic channel behaviour from contact resistance, trapping and ion migration, we develop reliable transport models and improve device performance.