Naphthodithieno[3,2-b]thiophene-based semiconductors: synthesis, characterization, and device performance of field-effect transistors

Abstract

A series of novel naphthodithieno[3,2-b]thiophene (NDTT) derivatives were successfully synthesized. Organic field-effect transistors based on these compounds were fabricated and the device performances were investigated in detail. By means of simple thermal annealing, the mobilities of NDTT-10 and NDTT-12 are dramatically improved from the order of 10⁻³ up to 0.22 and 0.13 cm² V⁻¹ s⁻¹, respectively. Furthermore, the structure–functional property relationships of these compounds are also discussed. NDTT is the new building block indeed, and further modification of the NDTT π-backbone would afford diverse new small molecular and polymeric π-functional materials for organic electronics.