Charge transport and contact resistance in coplanar devices based on colloidal polyaniline dispersion |
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| Authors: | Appan Merari Masillamani Nikola Pe?inka Milena Hajná Jaroslav Stejskal Denis Tondelier Yvan Bonnassieux Jean‐Charles Vanel Bernard Geffroy Denis Mencaraglia |
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| Institution: | 1. Laboratoire de Génie Electrique de Paris (LGEP, UMR 8507 CNRS), LGEP‐Supélec, Universités Paris VI and Paris XI, France;2. Laboratoire de Physique des Interfaces et des Couches Minces (LPICM, UMR 7647 CNRS), Ecole Polytechnique, Palaiseau, France;3. Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, Czech Republic;4. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Czech Republic;5. Laboratoire d'Innovation en Chimie des Surfaces et Nanosciences, CEA Saclay, DSM/IRAMIS, France |
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| Abstract: | The charge transport properties of thin films prepared from colloidal dispersion of polyaniline stabilized by poly(N‐vinylpyrrolidone) (PANI/PVP) have been investigated. The electrical characterization of coplanar device comprising of gold electrodes and PANI/PVP film deposited by spin coating served to gain insights into the contact and bulk resistance. The films prepared from PANI/PVP colloidal dispersion show high stability over a large temperature range. Temperature dependent measurements in the range from 90 to 350 K reveal that the charge transport can be described by a three‐dimensional variable‐range hopping mechanism as the dominant mode in the films. The stability of the films cast from dispersion within a large temperature range opens the possibility of the application as a polymer semiconductor layer in sensors and charge‐transport interlayer in organic solar cells. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016 , 54, 1710–1716 |
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| Keywords: | charge transport colloidal dispersion colloids conjugated polymers conductivity polyaniline thin films thin layers |
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