High performance organic field-effect transistors based on single-crystal microribbons and microsheets of solution-processed dithieno[3,2-b:2',3'-d]thiophene derivatives.

We present π-conjugated dithieno[3,2-b:2',3'-d]thiophene derivatives that act as high-performance p-type organic semiconductors. These molecules self-organize into single-crystal microribbons or microsheets. High carrier mobilities of up to 10.2 cm(2) V(-1) s(-1) and high on/off ratios of ~10(7) have been achieved in organic single-crystal field-effect transistors.