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Durham University

Department of Engineering

Staff Profile

Publication details for Professor Michael Petty

Petty, MC, Pearson, C, Monkman, AP, Casalini, R, Capaccioli, S & Nagel, J (2000). Application of impedance spectroscopy to the study of organic multilayer devices. Colloids and Surfaces A: Physicochemical and Engineering Aspects 171(1-3): 159-166.
  • Publication type: Journal Article
  • ISSN/ISBN: 0927-7757
  • Keywords: multilayer devices; impedance spectroscopy; light emitting devicesLIGHT-EMITTING-DIODES; COORDINATION POLYMER

Author(s) from Durham


The application of electrical impedance spectroscopy to gas sensors and
light emitting devices (LEDs) based on Langmuir-Blodgett (LB) films is
reviewed. The sensing material was a co-ordination polymer formed by
reaction of the bifunctional amphiphilic ligand 5,5'-methylenebis
(N-hexadecylsalicylideneamine)) (MBSH) and copper ions in an
interfacial reaction at the water surface. Changes of the device
capacitance and conductance during exposure to ethanol, acetonitrile
and benzene were related to the polarity of the organic vapour.
Impedance measurements on LEDs incorporating a substituted polypyridine
derivative, poly(6-hexyl-2,5-pyridinediyl), provided an understanding
of the equivalent circuit of the device structure. (C) 2000 Elsevier
Science B.V. All rights reserved.