Over Tenfold Increase in Current Amplification Due to Anisotropic Polymer Chain Alignment in Organic Electrochemical Transistors
Abstract
Abstract Organic electrochemical transistors (OECTs) are central to the development of highly sensitive (bio)sensors, energy‐efficient neuromorphic devices, and high‐precision electrophysiological monitoring systems. With growing interest in these strategic electronic devices, a novel PBTTT polymer bearing single‐ether side chains ( PBTTT‐ 8 O ) in OECTs is investigated. Pristine isotropic non‐aligned OECT performance matches state‐of‐the‐art transconductance, highlighting the potential of single ethers for designing high‐performance organic mixed ionic‐electronic conductors (OMIECs). Moreover, a 13× enhancement of current output is achieved by anisotropic polymer chain alignment of PBTTT‐ 8 O , opening doors to unprecedented device sensitivity. Compared to pristine ones, aligned OECTs afford a 6× increase in the normalized transconductance (g m L/Wd), reaching an unprecedented 2 580 S cm −1 . Such improvement is mainly due to a gain in carrier mobility µ, as evidenced by four distinct methods. In addition, aligned OECTs exhibit faster doping front propagation, ON switching, and OFF switching compared to pristine ones. This study hence reports a versatile and easily transferable approach to concomitantly boost signal amplification and accelerate the response time of bioelectronic devices.
Article Details
Authors (17)
Olivier Bardagot
Department of Chemistry Biochemistry and Pharmaceutical Sciences University of Bern Bern Switzerland
Pablo Durand
Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) University of Strasbourg CNRS, 25 rue Becquerel Strasbourg 67087 France
Shubhradip Guchait
Institut Charles Sadron (ICS) University of Strasbourg CNRS, 23 rue du Loess Strasbourg 67034 France
Han‐Yan Wu
Laboratory of Organic Electronics Department of Science and Technology Linköping University Norrköping Sweden
Isabelle Heinzen
Department of Chemistry Biochemistry and Pharmaceutical Sciences (DCBP) University of Bern Freiestrasse 3 Bern 3012 Switzerland
Wissal Errafi
Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) University of Strasbourg CNRS, 25 rue Becquerel Strasbourg 67087 France
Victor Bouylout
Institut Charles Sadron (ICS) University of Strasbourg CNRS, 23 rue du Loess Strasbourg 67034 France
Alessandra Pistillo
Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) University of Strasbourg CNRS, 25 rue Becquerel Strasbourg 67087 France
Chi‐Yuan Yang
n‐ink AB Norrköping SE‐60221 Sweden
Gonzague Rebetez
Department of Chemistry Biochemistry and Pharmaceutical Sciences (DCBP) University of Bern Freiestrasse 3 Bern 3012 Switzerland
Priscila Cavassin
Department of Chemistry Biochemistry and Pharmaceutical Sciences (DCBP) University of Bern Freiestrasse 3 Bern 3012 Switzerland
Badr Jismy
Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) University of Strasbourg CNRS, 25 rue Becquerel Strasbourg 67087 France
Julien Réhault
Department of Chemistry Biochemistry and Pharmaceutical Sciences (DCBP) University of Bern Freiestrasse 3 Bern 3012 Switzerland
Simone Fabiano
Laboratory of Organic Electronics, Department of Science and Technology, Linköping University
Martin Brinkmann
Institut Charles Sadron (ICS) University of Strasbourg CNRS, 23 rue du Loess Strasbourg 67034 France
Nicolas Leclerc
Institut De Chimie et Procédés Pour L'energie L'environnement Et La Santé (ICPEES) CNRS UMR 7515 École De Chimie Polymères Matériaux De Strasbourg (ECPM) Strasbourg Cedex France
Natalie Banerji
FemtoMat Research Group, Department Für Chemie Biochemie und Pharmazie, University of Bern Bern Switzerland