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Issue 89, 2016, Issue in Progress
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Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices

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Abstract

New two terminal surge protection devices based on intrinsic conducting polymers are demonstrated to be strongly affected by the dopant molecule type. Thermogravimetric analysis combined with current–voltage studies show a causal link between the dopant molecule, moisture content and the current limiting capability of the devices. Polyaniline thin-films with high moisture content produce devices with current saturation and foldback effects at high applied voltages while low moisture content films exhibit no current rectification and instead demonstrate decreasing resistivity with increasing voltage. Polyaniline doped with sulfuric acid (H2SO4) exhibited the largest moisture content and surge protection devices built with this material produced for the first time negative differential resistance under ambient conditions. A further improvement was made upon this through surface engineering of the interface between the polymer and electrodes using self-assembled monolayers.

Graphical abstract: Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices

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Publication details

The article was received on 21 Jul 2016, accepted on 04 Sep 2016 and first published on 05 Sep 2016


Article type: Paper
DOI: 10.1039/C6RA18549E
RSC Adv., 2016,6, 85710-85717

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    Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices

    N. H. Jabarullah, E. Verrelli, A. Gee, C. Mauldin, L. A. Navarro, J. H. Golden and N. T. Kemp, RSC Adv., 2016, 6, 85710
    DOI: 10.1039/C6RA18549E

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