Organo-metal Diodes Based on a Nanoparticulate Poly(3,4-ethylenedioxythiophene) Composite


  • This work was financially support by EPSRC of UK. We thank Dr. Tetyana Mykhaylyk (Department of Physics and Astronomy, University of Sheffield) for her assistance with the measurement and analysis of the thickness of the zirconium oxide layer.


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.