π-extended regioisomeric dithienoacenes fused pyrenes: structures, properties, and application in field-effect transistors

The optoelectronic properties of two novel regioisomeric dithienoacene-fused pyrenes were investigated. 2-SS-PDTA exhibits superior single-crystal FET mobility up to 1.35 cm 2 V −1 s −1 , in contrast to the 0.18 cm 2 V −1 s −1 for 1-SS-PDTA.