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Fast Deposition of an Ultrathin, Highly Crystalline Organic Semiconductor Film for High-Performance Transistors

Fast Deposition of an Ultrathin, Highly Crystalline Organic Semiconductor Film for High-Performance Transistors

Xiali Zhang, Wei Deng, Bei Lu, Xiaochen Fang, Xiujuan Zhang, Jiansheng Jie

Nanoscale Horiz. 2020 May 19.

PMID: 32424385

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1015071212	diF-TES-ADT		1015071-21-2	Price

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