Intrinsically stretchable organic field-effect transistors (STOFETs) that behave much like skin, have garnered widespread attention and demonstrated potential to more comfortable wearing electronics. Despite considerable efforts being exerted in stretchable hybrid polymeric semiconductors to achieve high-mobility and high-stretchability STOFETs, carbon nanotubes (CNTs) as ideal electrode materials, its interfacial quality seldom attracts research interests. Herein, we demonstrate a novel and general strategy on flexible CNT-based heterojunction electrodes by pentacene modification layer to enable high-performance and functional STOFETs. Pentacene transition layer can reduce the surface roughness and tune the heterogeneity of functional groups on the CNT thin film, as well as enhance the compatibility and van der Waals contact between CNT electrodes and organic semiconductors. The experimental results reveal that the carrier mobility of the resulting STOFETs increases by 2-3 times and the subthreshold slope decreases by 5 times compared with unmodified devices. The on-current/off-current ratio reaches nearly 10⁷, which is approximately 1000 times as high as unmodified devices, and the highest value for stretchable organic transistors reported so far. Furthermore, STOFETs with heterojunction electrodes demonstrate better performance homogeneity and higher strain-independent capability. Noteworthy, these are the first intrinsically stretchable organic phototransistors (STOPTs) with superior photoswitching performances and high strain tolerance developed.

本质上可拉伸的有机场效应晶体管（STOFET）的行为与皮肤非常相似，已经引起了广泛的关注，并显示出更舒适地佩戴电子设备的潜力。尽管为实现高迁移率和高拉伸性的STOFET，碳纳米管（CNT）作为理想的电极材料而在可拉伸的混合聚合物半导体中进行了大量的努力，但其界面质量却很少引起研究兴趣。在本文中，我们通过并五苯改性层展示了基于柔性CNT的异质结电极的新颖而通用的策略，以实现高性能和功能性的STOFET。并五苯过渡层可以降低表面粗糙度并调节CNT薄膜上官能团的异质性，以及增强CNT电极与有机半导体之间的相容性和范德华接触。实验结果表明，与未修改的器件相比，所得STOFET的载流子迁移率提高了2-3倍，亚阈值斜率降低了5倍。通断电流比达到近10^图7是未修饰器件的约1000倍高，并且是迄今为止报道的可拉伸有机晶体管的最高值。此外，具有异质结电极的STOFET表现出更好的性能均匀性和更高的应变独立能力。值得注意的是，这些是第一个具有优异的光开关性能和高应变容限的可固有拉伸的有机光电晶体管（STOPT）。