A photo-responsive organic electrochemical transistor

Nicholas Turetta, Wojciech Danowski, Luca Cusin, Pietro Antonio Livio, Rawad Hallani, Iain McCulloch, Paolo Samorì

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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.
Original languageEnglish (US)
JournalJournal of Materials Chemistry C
DOIs
StatePublished - Feb 28 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-03-21
Acknowledged KAUST grant number(s): CRG10
Acknowledgements: The authors acknowledge the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Actions UHMob (GA-811284), ULTIMATE (GA-813036), BORGES (GA-813863), LAD2DCOFS (GA-101027639), BOOSTER (GA-952911), RoLA-FLEX (GA-862474), CITYSOLAR (GA-101007084) as well as the Agence Nationale de la Recherche through the Interdisciplinary Thematic Institute SysChem via the IdEx Unistra (ANR-10-IDEX-0002) within the program Investissement d’Avenir, the International Center for Frontier Research in Chemistry (icFRC), the Institut Universitaire de France (IUF). The authors also acknowledge financial support from the KAUST Office of Sponsored Research (OSR) CRG 10 award, as well as EPSRC Project EP/T026219/1 and EP/W017091/1.

ASJC Scopus subject areas

  • General Chemistry
  • Materials Chemistry

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