Stretchable Redox‐Active Semiconducting Polymers for High‐Performance Organic Electrochemical Transistors
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 02, 2022
- Source ID
- 10.1002/adma.202201178
Entities
People
- Aleksander Prominski
- Bozhi Tian
- Huawei Hu
- Iain McCulloch
- Jie Xu
- Joseph W Strzalka
- Maximilian Moser
- Nan Li
- Ping Cheng
- Qingteng Zhang
- Shilei Dai
- Shivani Chatterji
- Sihong Wang
- Songsong Li
- Wei Liu
- Yahao Dai
- Yang Li
- Youdi Liu
Organizations
- Argonne National Laboratory
- King Abdullah University of Science and Technology
- Office of Naval Research
- Office of Science
- United States Department of Energy
- United States Naval Research Laboratory
- University of Chicago
- University of Oxford