Alignment and Field-Effect Transistor Behavior of an Alternative (pi)-Conjugated Copolymer of Thiophene and 4-Alkylthiazole

Charge-transfer-type (pi)-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.