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Issue 7, 2020
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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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Supplementary files

Article information


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

Nanoscale Horiz., 2020,5, 1096-1105
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, 5, 1096 DOI: 10.1039/D0NH00096E

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