Rational Optimization of Benzo[2,1-b;3,4-b′]dithilophene-Containing Polymers for Organic Field-Effect Transistors

The rational structure optimization of a polythiophene containing benzo[2,1b;3,4-b']dithiophene on the molecular level leads to a polymer that is easily synthesized and processed. Fabricated on a flexible substrate, the polymer shows excellent device characteristics, good reproducibility, and charge-carrier mobilities up to 0.5 cm(2) V-1 s(-1) without annealing.