Sterilizable Vertical n-Type Organic Electrochemical Transistors for Skin-conformal ECG Monitoring

Published

May 6, 2025

Author(s)

Ji Hwan Kim, Inho Lee, Won-June Lee, Dongjoon Shin, Hyeongbeom Lee, Lucas Flagg, Jagrity Chaudhary, Liyan You, Keehoon Kang, Jianguo Mei, Sungjun Park

Abstract

The development of stable, high-performance epidermal biosignal monitoring devices is critical for advancing wearable healthcare technologies. Here, we present a novel electrochemical transistor-based biosignal sensor utilizing a 4-terminal vertical Corbino configuration and an n-doped poly(benzodifurandione) (n-PBDF) polymer. The 4-terminal device configuration effectively reduces parasitic resistance, enabling a high transconductance of 374 mS at a low operational voltage. In addition, this device achieves exceptional operational stability, maintaining consistent performance over extended periods, and demonstrates superior shelf-life stability under ambient conditions. Furthermore, the sensor exhibits robust sterilization capabilities, withstanding both UV and thermal sterilization processes without performance degradation. Mechanical flexibility, a key requirement for on-skin applications, is ensured by the intrinsic properties of the n-PBDF polymer and the device architecture. The combination of these features makes this device an ideal candidate for monitoring of biosignals such as electrocardiograms, addressing critical commercialization challenges in wearable biosensing technologies.

Citation

(potentially a different journal, still TBD)

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.mser.2025.101003

Local Download

Keywords

OECT

Citation

Kim, J. , Lee, I. , Lee, W. , Shin, D. , Lee, H. , Flagg, L. , Chaudhary, J. , You, L. , Kang, K. , Mei, J. and Park, S. (2025), Sterilizable Vertical n-Type Organic Electrochemical Transistors for Skin-conformal ECG Monitoring, (potentially a different journal, still TBD), [online], https://doi.org/10.1016/j.mser.2025.101003, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959349 (Accessed December 11, 2025)