Growth of alkyl-monosubstituted thiophene/phenylene co-oligomer crystals and their device application

Abstract

We synthesized a novel small-molecule organic semiconductor, which is soluble in organic solvents at room temperature under normal pressure. We demonstrated that its high-quality crystalline films can be directly grown on substrates using various solution techniques such as solution casting, slow evaporation, and edge casting. We applied crystals to FETs with a bottom- or top-contact configuration, revealing that the carrier mobility ranged from ∼10−4 to ∼10−2 cm2 V−1 s−1.