High Field-Effect Mobilities for Diblock Copolymers of Poly(3-hexylthiophene) and Poly(methyl acrylate)


  • We are grateful to Rui Zhang for the TMAFM images, and to Suresh Santhanam, Jessica Cooper, Dr. Mihaela Iovu, Prof. Tomask Kowalewski, Bo Li, and Prof. David Greve for their help at various stages of this work. Financial support was provided by the National Science Foundation (CHE0415369).


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High field-effect mobilities from diblock copolymers of regioregular poly(3-hexylthiophene) and poly(methyl acrylate) (PMA) are reported. The mobilities are achieved at several PMA contents provided the SiO2 surface is treated with octyltrichlorosilane. The mobility decreases with increasing PMA content when the SiO2 surface is untreated. These results show the importance of self-assembly at the interface for good FET performance in bottom-contact FET devices.