Evaluation of thin film Capacitors Fabricated from Heterogeneous Polypyrrole Based Langmuir-Blodgett Films

Abstract

The electrical properties of Langmuir-Blodgett films of conducting polypyrrole were investigated in an effort to illucidate the molecular architecture of these multilayer films and determine the mechanism of conduction. Values of the dielectric constant and transverse conductivity recorded as a function of frequency were determined from electrical measurements performed on devices made with the conductive polymer. The highly anisotropic nature of the conductivity as well as the frequency dependence demonstrated by both the conductivity and dielectric constant provide evidence for a highly ordered molecular structure in which the conductive and insulative components of the multilayer film form an organized, layered structure. Even greater control of the electrical and structural properties has been achieved through the fabrication of a thin film superlattice in which the conducting polymer and an insulating derivative were deposited as alternating bilayers. The properties of the superlattice were close to those predicted for an inhomogeneous, mixed media.

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Correspondence to R. B. Rosner.

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Rosner, R.B., Rubner, M.F. Evaluation of thin film Capacitors Fabricated from Heterogeneous Polypyrrole Based Langmuir-Blodgett Films. MRS Online Proceedings Library 173, 363–368 (1989). https://doi.org/10.1557/PROC-173-363

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