Affiliation:
1. Department of Chemical and Materials Engineering Department of Electrical Engineering Centre for Applied Energy Research University of Kentucky Lexington KY 40506 USA
2. Department of Chemistry and Centre for Applied Energy Research University of Kentucky Lexington KY 40506 USA
3. Department of Chemistry University of Kentucky Lexington KY 40506 USA
4. Brookhaven National Lab Upton NY 11973 USA
5. Department of Chemistry Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
6. King Abdullah University of Science and Technology KAUST Solar Centre Thuwal 23955‐6900 Saudi Arabia
Abstract
AbstractOrganic mixed ionic–electronic conductors (OMIECs) have varied performance requirements across a diverse application space. Chemically doping the OMIEC can be a simple, low‐cost approach for adapting performance metrics. However, complex challenges, such as identifying new dopant materials and elucidating design rules, inhibit its realization. Here, these challenges are approached by introducing a new n‐dopant, tetrabutylammonium hydroxide (TBA‐OH), and identifying a new design consideration underpinning its success. TBA‐OH behaves as both a chemical n‐dopant and morphology additive in donor acceptor co‐polymer naphthodithiophene diimide‐based polymer, which serves as an electron transporting material in organic electrochemical transistors (OECTs). The combined effects enhance OECT transconductance, charge carrier mobility, and volumetric capacitance, representative of the key metrics underpinning all OMIEC applications. Additionally, when the TBA+ counterion adopts an “edge‐on” location relative to the polymer backbone, Coulombic interaction between the counterion and polaron is reduced, and polaron delocalization increases. This is the first time such mechanisms are identified in doped‐OECTs and doped‐OMIECs. The work herein therefore takes the first steps toward developing the design guidelines needed to realize chemical doping as a generic strategy for tailoring performance metrics in OECTs and OMIECs.
Funder
National Science Foundation
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Brookhaven National Laboratory
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)
Cited by
2 articles.
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