Self-assembled single-crystal organic semiconductors via solution process for high-performance supramolecular transistors

摘要

Control over supramolecular organization of electronically active π-conjugated organic molecules provides great opportunities to fine-tune and optimize their electrical properties for applications in organic field-effect transistors and sensors. Here we report high-quality single-crystal organic semiconductors with conjugated organic molecules via facile solution processing. We show a well-faceted, high-quality 1D single-crystal microwire using self-organized poly (3-hexylthiophene), P3HT with unprecedented electrical characteristics such as a low resistance (0.5 MΩ), a channel current as high as 25 μA, and a well-resolved gate modulation via solution growth. Furthermore, we report the fabrication of high-quality 1D triisopropylsilylethynyl pentacene (TIPS_PEN) microribbons via a simple solution process with well-defined facets and remarkable electrical characteristics, such as field-effect mobility as high as 1.4 cm~2/V.s. We found that 1D single-crystal microwires and microribbons are formed spontaneously through facile self-assembly of individual conjugated molecules. Our findings indicate that π-conjugated organic single-crystals are capable of very efficient charge transport.