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Fast deposition of an ultrathin, highly crystalline organic semiconductor film for high-performance transistors.
Nanoscale Horizons ( IF 9.7 ) Pub Date : 2020-05-05 , DOI: 10.1039/d0nh00096e
Xiali Zhang 1 , Wei Deng , Bei Lu , Xiaochen Fang , Xiujuan Zhang , Jiansheng Jie
Affiliation  

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.

中文翻译:

快速沉积用于高性能晶体管的超薄,高度结晶的有机半导体薄膜。

超薄有机半导体(OSC)晶体膜有望实现高性能,灵活和透明的有机电子设备。然而,在大面积上快速且高通量的均匀无针孔超薄OSC晶体膜的溶液沉积仍然是一个挑战。在这里,我们证明了混合溶剂系统可以明显改变流体流动动力学并显着改善薄膜的刮涂质量,从而使我们能够获得大面积连续且光滑的双(三乙基甲硅烷基乙炔基)蒽噻吩(Dif-TES-ADT) )超薄膜,涂覆速度约为1 mm s -1,远远优于30–50μms -1用于常规方法。此外,超薄,高度结晶的基于Dif-TES-ADT薄膜的有机薄膜晶体管(OTFT)的最大迁移率高达5.54 cm 2 V -1 s -1,与Dif-TES-ADT相当基于单晶的器件,并且是基于Dif-TES-ADT薄膜器件的最高器件。这一发现应该为实现基于超薄OSC晶体膜的高性能柔性和透明电子产品开辟一条新途径。
更新日期:2020-06-29
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