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Keywords:

  • Conducting Polymers;
  • Diodes, organic;
  • Metal–organic junctions;
  • Nanocomposites;
  • Organic electronics;
  • Poly(3,4-ethylenedioxythiophene)

Abstract

Diodes composed of a nanoparticulate composite of poly(3,4-ethylenedioxythiophene) and a Cu–Cu2+ redox couple in a poly(ethylene oxide)–LiBF4 polymer-electrolyte matrix between Ag and Zr electrodes show rectifications in excess of 50 000 at applied fields of 4 V. These large changes are considered to arise from both rectification at the Zr/ZrO2 composite interface and from the switching of the composite material between two conductivity states by the application of a low potential field. The preparation and electrochemical characterisation of these novel active devices are discussed.