ESR study of electrochemical doping in the conducting polymer polypyrrole

F. Genoud, M. Guglielmi, M. Nechtschein, E. Genies, and M. Salmon
Phys. Rev. Lett. 55, 118 – Published 1 July 1985
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Abstract

Steady-state and transient measurements of spin concentration have been carried out as a function of electrochemical charge injection in polypyrrole. A maximum of one spin per ∼10 pyrrole units has been observed for about 50% of the maximum charge. The data are interpreted in terms of quasiequilibrium polaron and bipolaron populations resulting from a two-step redox process. Surprisingly, it appears that at low doping levels, bipolaron formation is not favorable compared to formation of two polarons.

  • Received 27 December 1984

DOI:https://doi.org/10.1103/PhysRevLett.55.118

©1985 American Physical Society

Authors & Affiliations

F. Genoud, M. Guglielmi, and M. Nechtschein

  • Service de Physique/Dynamique de Spin et Proprietes Electroniques, Departement de Recherche Fondamentale, Centre d’Etudes Nucléaires de Grenoble, 85X, 38041 Grenoble Cedex, France

E. Genies and M. Salmon

  • Laboratoires de Chimie, Departement de Recherche Fondamentale, Centre d’Etudes Nucléaires de Grenoble, 85X, 38041 Grenoble Cedex, France

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Vol. 55, Iss. 1 — 1 July 1985

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