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Salts as Additives: A Route to Improve Performance and Stability of n-Type Organic Electrochemical Transistors.
Ohayon, David; Flagg, Lucas Q; Giugni, Andrea; Wustoni, Shofarul; Li, Ruipeng; Hidalgo Castillo, Tania C; Emwas, Abdul-Hamid; Sheelamanthula, Rajendar; McCulloch, Iain; Richter, Lee J; Inal, Sahika.
Afiliación
  • 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.
  • Richter LJ; Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom.
  • Inal S; Materials Science and Engineering Division, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States.
ACS Mater Au ; 3(3): 242-254, 2023 May 10.
Article en En | MEDLINE | ID: mdl-38089129
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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Mater Au Año: 2023 Tipo del documento: Article País de afiliación: Arabia Saudita Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Mater Au Año: 2023 Tipo del documento: Article País de afiliación: Arabia Saudita Pais de publicación: Estados Unidos