Fabrication by vaporized film deposition and In-situ FET measurements of polycrystalline thiophene/phenylene Co-oligomer films

Herein, we present a vapor film deposition method for fabricating the polycrystalline films of a thiophene/phenylene co-oligomer. The polycrystalline film has a comparable physical and optical characteristic to the single-crystal phase, as the film consists of tiny single crystals with the grain size of 5 – 20 μm. Meanwhile, the in-situ FET results illustrate the dominant unipolar p-type characteristics with a hole mobility of 0.025 cm2/Vs, higher than the conventional physical deposited films owing to the standing molecular orientation.