Wang Shuguang, Wang Zhongwu, Huang Yinan, Hu Yongxu, Yuan Liqian, Guo Shujing, Zheng Lei, Chen Mingxi, Yang Chenhuai, Zheng Yingshuang, Qi Jiannan, Yu Li, Li Hongwei, Wang Wenchong, Ji Deyang, Chen Xiaosong, Li Jie, Li Liqiang, Hu Wenping
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Institute of Molecular Aggregation Science, Tianjin University, 300072 Tianjin, China.
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering, 300072 Tianjin, China.
ACS Appl Mater Interfaces. 2021 Apr 21;13(15):17852-17860. doi: 10.1021/acsami.1c01386. Epub 2021 Apr 7.
Conductive polymers are considered promising electrode materials for organic transistors, but the reported devices with conductive polymer electrodes generally suffer from considerable contact resistance. Currently, it is still highly challenging to pattern conductive polymer electrodes on organic semiconductor surfaces with good structure and interface quality. Herein, we develop an in situ polymerization strategy to directly pattern the top-contacted polypyrrole (PPy) electrodes on hydrophobic surfaces of organic semiconductors by microchannel templates, which is also applicable on diverse hydrophobic and hydrophilic surfaces. Remarkably, a width-normalized contact resistance as low as 1.01 kΩ·cm is achieved in the PPy-contacted transistors. Both p-type and n-type organic field-effect transistors (OFETs) exhibit ideal electrical characteristics, including almost hysteresis-free, low threshold voltage, and good stability under long-term test. The facile patterning method and high device performance indicate that the polymerization strategy in confined microchannels has application prospects in all-organic, transparent, and flexible electronics.
导电聚合物被认为是用于有机晶体管的有前景的电极材料，但报道的具有导电聚合物电极的器件通常存在相当大的接触电阻。目前，在有机半导体表面上以良好的结构和界面质量对导电聚合物电极进行图案化仍然极具挑战性。在此，我们开发了一种原位聚合策略，通过微通道模板在有机半导体的疏水表面上直接对顶部接触的聚吡咯（PPy）电极进行图案化，该策略也适用于各种疏水和亲水表面。值得注意的是，在PPy接触的晶体管中实现了低至1.01 kΩ·cm的宽度归一化接触电阻。p型和n型有机场效应晶体管（OFET）均表现出理想的电学特性，包括几乎无滞后、低阈值电压以及在长期测试下具有良好的稳定性。这种简便的图案化方法和高器件性能表明，受限微通道中的聚合策略在全有机、透明和柔性电子学方面具有应用前景。
