Patent ID: 8338555

Claim:
An organic thin film transistor comprising a semiconductor layer, a polymeric layer in contact with the semiconductor layer, a gate electrode, a source electrode and a drain electrode, wherein the semiconductor layer comprises an organic semiconductor compound, and the polymeric layer consists of a photocrosslinked product of a homopolymer of the repeating unit: wherein R 1 and R 2 independently are selected from H and F; and the phenyl group optionally is substituted with 1-5 substituents independently selected from the group consisting of a C 1-20 alkyl group, a C 1-20 haloalkyl group, a C 1-20 alkoxy group, and a —O—C 1-20 haloalkyl group; and the organic thin film transistor exhibits a mobility of at least about 0.01 cm 2 /Vs and an I on /I off ratio of at least about 10 3 .