[Abstract]

We demonstrate here the design, synthesis and characterization of two new chlorinated polymers, P(NDI2HD-T2CI2) and P(NDI20D-T2CI2) based on N.N-difunctionalized naphthalene diimide (NDI) and 3, 3’-dichloro-2, 2’-bithiophene (T2CI2) moieties. Our results indicate that organic thin-film transistors (OTFTs) based on these new chlorinated polymers exhibit electron mobilities approaching 0.1 cm²V⁻¹s⁻¹ (Ion:/off ~ 10⁶-10⁷), with far less ambipolarity due to their lower highest occupied molecular orbital energies, and they are more stable under deleterious high-humidity conditions (RH ~ 60%) and upon submersion in water, compared with those fabricated with the parent non-chlorinated polymers. In addition, OTFTs fabricated with the new chlorinated polymers exhibit excellent operational stabilities with <3% degradations upon bias-stress test.