Alignment and Field-Effect Transistor Behavior of an Alternative π-Conjugated Copolymer of Thiophene and 4-Alkylthiazole

Charge-transfer-type π-conjugated copolymer of thiophene and 4-alkylthiazole is aligned on the surface of a platinum substrate, with the alkyl groups oriented toward the surface of the substrate. The copolymer served as a good material for a polymer field-effect transistor and gave a mobility of 2.5 × 10 - 3 cm 2 V - 1 s - 1 .