High-performance solution-processable poly(p-phenylene vinylene)s for air-stable organic field-effect transistors

Symmetrically substituted poly(p-phe-nylene vinylene)s (PPVs) with linear alkyl chains (e.g., R1, R2 = n-C11H23, R3 = n-C18H37 in Figure) are found to provide the highest charge-carrier mobilitites when used in organic field-effect transistors (as compared with unsymmetrical substitution or branched side chains). Annealing at 110 deg C further improves mobility to ~10-2 cm2V-1s-1 (see.Figure) and provides transistors which are stable in air and in the dark.