Issue 24, 2023

A photo-responsive organic electrochemical transistor

Abstract

The design of novel organic electrochemical transistor (OECT) channel materials that can be controlled by a whole range of external stimuli is key towards the emergence of unprecedented technologies in bioelectronics. Like the established multiresponsive field-effect transistors, multiresponsive OECTs can in principle be realised via blending, by combining multiple components with each one imparting a specific function to the device. Here we report the first example of an optically switchable OECT which is capable of undergoing a reversible modulation of its ON current by up to 30% upon irradiation with UV and visible light. By investigating the electrical characteristics of the channel material, in conjunction with the electronic characterisation performed by a macroscopic Kelvin probe technique and photoemission yield spectroscopy in air, we gained distinct insight into the electrochemical doping process occurring within the blend upon light irradiation. Such a proof-of-concept work opens perspectives towards the implementation of complex neuromorphic operations and algorithms in OECTs.

Graphical abstract: A photo-responsive organic electrochemical transistor

Supplementary files

Article information

Article type
Communication
Submitted
21 Dec. 2022
Accepted
17 Febr. 2023
First published
28 Febr. 2023
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. C, 2023,11, 7982-7988

A photo-responsive organic electrochemical transistor

N. Turetta, W. Danowski, L. Cusin, P. A. Livio, R. Hallani, I. McCulloch and P. Samorì, J. Mater. Chem. C, 2023, 11, 7982 DOI: 10.1039/D2TC05444B

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