Thermodynamics of organic electrochemical transistors

Nature Publishing Group 2022 2024-03-05

Despite their increasing usefulness in a wide variety of applications, organic electrochemical transistors still lack a comprehensive and unifying physical framework able to describe the current-voltage characteristics and the polymer/electrolyte interactions simultaneously. Building upon thermodynamic axioms, we present a quantitative analysis of the operation of organic electrochemical transistors. We reveal that the entropy of mixing is the main driving force behind the redox mechanism that rules the transfer properties of such devices in electrolytic environments. In the light of these findings, we show that traditional models used for organic electrochemical transistors, based on the theory of field-effect transistors, fall short as they treat the active material as a simple capacitor while ignoring the material properties and energetic interactions. Finally, by analyzing a large spectrum of solvents and device regimes, we quantify the entropic and enthalpic contributions and put forward an approach for targeted material design and device applications.

Thermodynamics, organic electrochemical transistors, thermodynamic axioms, entropy of mixing, redox mechanism; Thermodynamik, organische elektrochemische Transistoren, thermodynamische Axiome, Entropie der Vermischung, Redox-Mechanismus; info:eu-repo/classification/ddc/500; ddc:500; info:eu-repo/semantics/publishedVersion; doc-type:article; info:eu-repo/semantics/article; doc-type:Text

Open access content. Open access content
info:eu-repo/semantics/openAccess

English

SUUSL oai:qucosa:de:qucosa:89684
urn:nbn:de:bsz:14-qucosa2-896849
1445763490

STAATS U UNIV
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