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Stretchable Redox-Active Semiconducting Polymers for High-Performance Organic Electrochemical Transistors
Advanced Materials ( IF 27.4 ) Pub Date : 2022-04-21 , DOI: 10.1002/adma.202201178 Yahao Dai 1 , Shilei Dai 1 , Nan Li 1 , Yang Li 1 , Maximilian Moser 2 , Joseph Strzalka 3 , Aleksander Prominski 4 , Youdi Liu 1 , Qingteng Zhang 3 , Songsong Li 1 , Huawei Hu 1 , Wei Liu 1 , Shivani Chatterji 1 , Ping Cheng 1 , Bozhi Tian 4 , Iain McCulloch 2, 5 , Jie Xu 6 , Sihong Wang 1, 6
Advanced Materials ( IF 27.4 ) Pub Date : 2022-04-21 , DOI: 10.1002/adma.202201178 Yahao Dai 1 , Shilei Dai 1 , Nan Li 1 , Yang Li 1 , Maximilian Moser 2 , Joseph Strzalka 3 , Aleksander Prominski 4 , Youdi Liu 1 , Qingteng Zhang 3 , Songsong Li 1 , Huawei Hu 1 , Wei Liu 1 , Shivani Chatterji 1 , Ping Cheng 1 , Bozhi Tian 4 , Iain McCulloch 2, 5 , Jie Xu 6 , Sihong Wang 1, 6
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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.
中文翻译：
用于高性能有机电化学晶体管的可拉伸氧化还原活性半导体聚合物
有机电化学晶体管 (OECT) 代表了下一代生物电子学的新兴器件平台，因为它具有独特的高放大率和对生物信号的敏感性。为了实现无缝的组织-电子接口以获取准确的信号，皮肤般的柔软性和可拉伸性是必不可少的要求，但它们尚未应用于高性能 OECT，这主要是由于缺乏可拉伸的氧化还原活性半导体聚合物。本文报道了一种用于 OECT 器件的可拉伸半导体，即聚(2-(3,3'-bis(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-[2,2'-bithiophen]-5)基噻吩) (p(g2T-T))，具有超过 200% 应变和 5000 次重复拉伸循环的出色拉伸性，以及与最先进技术相媲美的 OECT 性能。通过对不同聚合物的系统表征和比较验证，这种聚合物能够结合高拉伸性和高 OECT 性能的关键设计特征是非线性主链结构、适中的侧链密度和足够高的分子量。使用这种高度可拉伸的聚合物半导体，可以制造具有高归一化跨导（≈223 S cm-1 ) 和高达 100% 应变的双轴拉伸性。此外，还展示了皮肤上心电图 (ECG) 记录，它结合了内置放大功能和前所未有的皮肤顺应性。
更新日期：2022-04-21
中文翻译：
用于高性能有机电化学晶体管的可拉伸氧化还原活性半导体聚合物
有机电化学晶体管 (OECT) 代表了下一代生物电子学的新兴器件平台，因为它具有独特的高放大率和对生物信号的敏感性。为了实现无缝的组织-电子接口以获取准确的信号，皮肤般的柔软性和可拉伸性是必不可少的要求，但它们尚未应用于高性能 OECT，这主要是由于缺乏可拉伸的氧化还原活性半导体聚合物。本文报道了一种用于 OECT 器件的可拉伸半导体，即聚(2-(3,3'-bis(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-[2,2'-bithiophen]-5)基噻吩) (p(g2T-T))，具有超过 200% 应变和 5000 次重复拉伸循环的出色拉伸性，以及与最先进技术相媲美的 OECT 性能。通过对不同聚合物的系统表征和比较验证，这种聚合物能够结合高拉伸性和高 OECT 性能的关键设计特征是非线性主链结构、适中的侧链密度和足够高的分子量。使用这种高度可拉伸的聚合物半导体，可以制造具有高归一化跨导（≈223 S cm-1 ) 和高达 100% 应变的双轴拉伸性。此外，还展示了皮肤上心电图 (ECG) 记录，它结合了内置放大功能和前所未有的皮肤顺应性。
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