Polymer Field-Effect Transistors for Transport Property Studies

Thin film field-effect transistors have been prepared of poly(3-alkyl-thiophenes) by using spin-coating techniques. The devices are used in the determination of the charge carrier mobility μ, dc conductivity σ, and the carrier concentration p0. Poly(3-hexylthiophene) is characterized in a wide temperature range T = 130–430 k, and possible transport mechanisms are discussed.