An asymmetric oligomer based on thienoacene for solution processed crystal organic thin-film transistors

Abstract

A novel thienoacene-based conjugated oligomer, i.e.BTTT-T-C12, was designed and synthesized. Its highly asymmetric structural feature enables the preparation of two-dimensional single-crystalline thin films in millimetre size and ∼100 nm thick by a solution processing method directly on the Si/SiO₂ substrate. Single crystal organic thin film transistors exhibit a mobility of 0.70 cm² V⁻¹ s⁻¹ and an on/off ratio of 5.7 × 10⁴.