CPOS Seminar: Toward fast and stable organic electrochemical transistors

Speaker: SILAN ZHANG, PhD Student, Laboratory of Organic Electronics, Department of Science and Technology, Linköping University

Abstract:: Organic electrochemical transistors (OECTs) have shown great promise in various applications ranging from digital logic circuits to biosensors and neuromorphic devices. However, slow response time and lack of stability hinder their widespread commercial implementation. In this talk, I will first showcase the benefits of incorporating multi-walled carbon nanotubes (MWCNTs) in the bulk of rigid ladder n-type polymers such as poly(benzimidazobenzophenanthroline) (BBL) for high-performance n-type OECTs. I will explain how the use of MWCNTs significantly enhances electron mobility and transient response of the OECTs by over one order of magnitude. Additionally, I will delve into the effect of electrochemical side reactions on the stability and degradation of thiophene-based OECTs, and present a solution to suppress these reactions, resulting in a dramatic improvement in OECT stability without compromising other device metrics. The insight gained from these studies will aid in designing efficient, stable, and safe bioelectronic devices.

Bio: Silan Zhang is a PhD student in Prof. Simone Fabiano’s group at Linköping University. Her research focuses on the fundamental studies of organic electrochemical transistors (OECTs). Before joining Linköping University, she obtained MSc from ShanghaiTech University and University of Chinese Academy of Sciences.