Chlorination as a useful method to modulate conjugated polymers: balanced and ambient-stable ambipolar high-performance field-effect transistors and inverters based on chlorinated isoindigo polymers

Abstract

For the first time, ambient-stable and balanced carrier transport is achieved in polymer ambipolar field-effect transistors (FETs) and inverters with high performance. With chlorinated isoindigo polymers, FETs fabricated in ambient conditions show hole mobilities up to 0.81 cm² V⁻¹ s⁻¹ and dramatically increased electron mobilities from 10⁻² to 0.66 cm² V⁻¹ s⁻¹. Hence, chlorination is effective to modulate electronic properties and improve the device performance of conjugated polymers.