Salts as Additives: A Route to Improve Performance and Stability of n-Type Organic Electrochemical Transistors.

Autor:	Ohayon D; Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia., Flagg LQ; Materials Science and Engineering Division, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States., Giugni A; Department of Physics, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy., Wustoni S; Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia., Li R; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States., Hidalgo Castillo TC; Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia., Emwas AH; Core Laboratories, KAUST, Thuwal 23955-6900, Saudi Arabia., Sheelamanthula R; Physical Sciences and Engineering Division, KAUST, Thuwal 23955-6900, Saudi Arabia., McCulloch I; Physical Sciences and Engineering Division, KAUST, Thuwal 23955-6900, Saudi Arabia.; Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom., Richter LJ; Materials Science and Engineering Division, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States., Inal S; Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Jazyk:	angličtina
Zdroj:	ACS materials Au [ACS Mater Au] 2023 Mar 06; Vol. 3 (3), pp. 242-254. Date of Electronic Publication: 2023 Mar 06 (Print Publication: 2023).
DOI:	10.1021/acsmaterialsau.2c00072
Abstrakt:	Organic electrochemical transistors (OECTs) are becoming increasingly ubiquitous in various applications at the interface with biological systems. However, their widespread use is hampered by the scarcity of electron-conducting (n-type) backbones and the poor performance and stability of the existing n-OECTs. Here, we introduce organic salts as a solution additive to improve the transduction capability, shelf life, and operational stability of n-OECTs. We demonstrate that the salt-cast devices present a 10-fold increase in transconductance and achieve at least one year-long stability, while the pristine devices degrade within four months of storage. The salt-added films show improved backbone planarity and greater charge delocalization, leading to higher electronic charge carrier mobility. These films show a distinctly porous morphology where the interconnectivity is affected by the salt type, responsible for OECT speed. The salt-based films display limited changes in morphology and show lower water uptake upon electrochemical doping, a possible reason for the improved device cycling stability. Our work provides a new and easy route to improve n-type OECT performance and stability, which can be adapted for other electrochemical devices with n-type films operating at the aqueous electrolyte interface. Competing Interests: The authors declare no competing financial interest. (© 2023 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu