A Single n-type Semiconducting Polymer-Based Photo-Electrochemical Transistor

• DOI: 10.48550/arxiv.2305.06810
• Publication Date: 2023-01-01
• Authors: Victor Druet; David Ohayon; Christopher E. Pe...; Yizhou Zhong; Nisreen Alshehri; Anil Koklu; Prem D. Nayak; Luca Salvigni; Latifah Almulla; Jokūbas Surgailis; Sophie Griggs; Iain McCulloch; Frédéric Laquai; Sahika Inal
• Keywords: Light intensity

Conjugated polymer films that can conduct ionic and electronic charges are central to building soft sensors actuators. Despite the possible interplay between light absorption mixed conductivity of these materials in aqueous biological media, no film has ever been used realize a solar-switchable organic bioelectronic circuit relying on fully reversible, redox reaction-free mechanism. Here we show absorbed by an electron cation-transporting reversibly modulates its electrochemical potential electrolyte, leveraged design n-type photo-electrochemical transistor (n-OPECT). We generate output characteristics solely varying intensity hits polymeric gate electrode, emulating voltage-controlled modulation channel current. The micron-scale n-OPECT shows high signal-to-noise ratio excellent sensitivity low intensities. demonstrate three direct applications n-OPECT, i.e., photoplethysmogram recorder, light-controller inverter circuit, light-gated artificial synapse, underscoring suitability this platform for myriad biomedical involve changes.