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Fast deposition of an ultrathin, highly crystalline organic semiconductor film for high-performance transistors

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Abstract

Ultrathin organic semiconductor (OSC) crystalline films hold the promise of achieving high-performance, flexible, and transparent organic electronic devices. However, fast and high-throughput solution deposition of uniform pinhole-free ultrathin OSC crystalline films over a large area remains a challenge. Here, we demonstrate that a mixed solvent system can obviously alter the fluid flow dynamics 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-film transistors (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-based devices and among the highest for Dif-TES-ADT film-based devices. This finding should open a new route to achieve ultrathin OSC crystalline film-based high-performance flexible and transparent electronics.

Graphical abstract: Fast deposition of an ultrathin, highly crystalline organic semiconductor film for high-performance transistors

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Article information


Submitted
13 Feb 2020
Accepted
05 May 2020
First published
05 May 2020

Nanoscale Horiz., 2020, Advance Article
Article type
Communication

Fast deposition of an ultrathin, highly crystalline organic semiconductor film for high-performance transistors

X. Zhang, W. Deng, B. Lu, X. Fang, X. Zhang and J. Jie, Nanoscale Horiz., 2020, Advance Article , DOI: 10.1039/D0NH00096E

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