Bis[1]benzothieno[2,3-d:2′,3′-d′]anthra[1,2-b:5,6-b′]dithiophene: synthesis, characterization, and application to organic field-effect transistors

We report the straightforward synthetic method and characterization of bis[1]benzothieno[2,3-d:2′,3′-d′]anthra[1,2-b:5,6-b′]dithiophene (BBTADT) having nine aromatic rings fused without solubilizing groups. The highest mobility of fabricated OFETs utilizing BBTADT exhibited 2.7 × 10−2 cm2 V−1 s−1 in polycrystalline films formed by vapor deposition, depending on the annealing temperatures of a substrate.