Field-effect mobility of poly(3-hexylthiophene)

Abstract
A field‐effect transistor structure is used to study the transport properties of the soluble conductive polymer, poly(3‐hexylthiophene). We have measured conductance, mobility, and carrier concentration in undoped polymer thin films. The field‐effect mobility was found to be 105–104 cm2/V s at room temperature. The mobility decreases with increased temperature. The change is only partly reversible. Possible transport models are discussed.