Organic Thin Film Transistors from a Soluble Oligothiophene Derivative Containing Thermally Removable Solubilizing Groups

摘要

The solubility of organic semiconducting materials is a particularly important consideration when evaluating candidates for use in low-cost electronic devices such as organic thin film transistors (OTFTs), since the desired processing of these materials includes solution-based methods such as spin coating, stamping, or ink-jet printing. These methods have the advantage of being conducted at ambient temperatures, allowing for the use of a great variety of substrates such as plastic or fabric, and they are also amenable to large-area or continuous applications. However, highly conjugated organic materials are notoriously difficult to manipulate due to their low solubility. Therefore, our focus in designing the next generation of organic semiconductors has been to impart solubility to the materials through the use of strategically placed substituents. Herein we report the synthesis and characterization of a symmetrical α,ω-substituted sexithiophene derivative containing thermally removable solubilizing groups for use in solution-processed OTFTs.