生物电子学
材料科学
纳米技术
聚合物
晶体管
导电聚合物
可伸缩电子设备
半导体
有机电子学
光电子学
有机半导体
数码产品
复合材料
生物传感器
电气工程
工程类
电压
作者
Yahao Dai,Shilei Dai,Nan Li,Yang Li,Maximilian Moser,Joseph Strzalka,Aleksander Promiński,Youdi Liu,Qingteng Zhang,Songsong Li,Huawei Hu,Wei Liu,Shivani Chatterji,Ping Cheng,Bozhi Tian,Iain McCulloch,Jie Xu,S. Wang
标识
DOI:10.1002/adma.202201178
摘要
Organic electrochemical transistors (OECTs) represent an emerging device platform for next-generation bioelectronics owing to the uniquely high amplification and sensitivity to biological signals. For achieving seamless tissue-electronics interfaces for accurate signal acquisition, skin-like softness and stretchability are essential requirements, but they have not yet been imparted onto high-performance OECTs, largely due to the lack of stretchable redox-active semiconducting polymers. Here, a stretchable semiconductor is reported for OECT devices, namely poly(2-(3,3'-bis(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-[2,2'-bithiophen]-5)yl thiophene) (p(g2T-T)), which gives exceptional stretchability over 200% strain and 5000 repeated stretching cycles, together with OECT performance on par with the state-of-the-art. Validated by systematic characterizations and comparisons of different polymers, the key design features of this polymer that enable the combination of high stretchability and high OECT performance are a nonlinear backbone architecture, a moderate side-chain density, and a sufficiently high molecular weight. Using this highly stretchable polymer semiconductor, an intrinsically stretchable OECT is fabricated with high normalized transconductance (≈223 S cm-1 ) and biaxial stretchability up to 100% strain. Furthermore, on-skin electrocardiogram (ECG) recording is demonstrated, which combines built-in amplification and unprecedented skin conformability.
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