Abstract

Ultrathinorganic semiconductor (OSC) crystalline films hold the promise of achievinghigh-performance, flexible, and transparent organic electronic devices.However, fast and high-throughput solution deposition of uniform pinhole-freeultrathin OSC crystalline films over a large area remains a challenge. Here, wedemonstrate that a mixed solvent system can obviously alter the fluid flowingdynamics and significantly improve the blade-coating quality of the film,enabling us to achieve a large-area continuous and smooth bis(triethylsilylethynyl)anthradithiophene(Dif-TES-ADT) ultrathin film at a fast coating speed of ~1 mm s^-1,much superior to the 30-50 μm s^-1 for conventional methods. Also,the ultrathin, highly crystalline Dif-TES-ADT film-based organic thin-filmtransistors (OTFTs) exhibit a maximum mobility up to 5.54 cm² V^-1 s^-1, which is on par with the Dif-TES-ADT single crystal-baseddevices and among the highest for Dif-TES-ADT film-based devices. This findingshould open a new route to achieve ultrathin OSC crystalline film-basedhigh-performance flexible andtransparent electronics.