Issue 12, 2024

N-Type polymeric mixed conductors for all-in-one aqueous electrolyte gated photoelectrochemical transistors

Abstract

An organic photoelectrochemical transistor (OPECT) is an organic electrochemical transistor (OECT) that utilizes light to toggle between ON and OFF states. The current response to light and voltage fluxes in aqueous media renders the OPECT ideal for the development of next-generation bioelectronic devices, including light-assisted biosensors, light-controlled logic gates, and artificial photoreceptors. However, existing OPECT architectures are complex, often requiring photoactive nanostructures prepared through labor-intensive synthetic methods, and despite this complexity, their performance remains limited. In this study, we develop aqueous electrolyte-compatible optoelectronic transistors using a single n-type semiconducting polymer. The n-type film performs multiple tasks: (1) gating the channel, (2) generating a photovoltage in response to light, and (3) coupling and transporting cations and electrons in the channel. We systematically investigate the photoelectrochemical properties of a range of n-type polymeric mixed conductors to understand the material requirements for maximizing phototransistor performance. Our findings contribute to the identification of crucial material and device properties necessary for constructing high-performance OPECTs with simplified design features and a direct interface with biological systems.

Graphical abstract: N-Type polymeric mixed conductors for all-in-one aqueous electrolyte gated photoelectrochemical transistors

Supplementary files

Article information

Article type
Communication
Submitted
07 3月 2024
Accepted
25 3月 2024
First published
26 3月 2024
This article is Open Access
Creative Commons BY license

Mater. Horiz., 2024,11, 2937-2949

N-Type polymeric mixed conductors for all-in-one aqueous electrolyte gated photoelectrochemical transistors

L. Almulla, V. Druet, C. E. Petoukhoff, W. Shan, N. Alshehri, S. Griggs, Y. Wang, M. Alsufyani, W. Yue, I. McCulloch, F. Laquai and S. Inal, Mater. Horiz., 2024, 11, 2937 DOI: 10.1039/D4MH00267A

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