Availability of Liquid Crystallinity in Solution Processing for Polycrystalline Thin Films

摘要

The research of materials for organic field-effect transistors (OFETs) has been extended to the exploration for new materials suitable for the fabrication of polycrystalline thin films by solution processes such as spin-coating and ink-jet techniques instead of costly vacuum evaporation techniques. In fact, solution-processed polycrystalline thin films from precursor materials,such as 6,13-bis(triisopropylsilylethynyl)-pentacene, and alkylated oligothiophene,hexabenzocoronene,and benzothienobenzothiophene (BTBT) derivatives, attained high field-effect transistor (FET) mobility over 1 cm V~(-1) s~(-1) comparable to that of vacuum evaporated films of pentacene.