Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 5, Pages 1304-1308Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2009.10.031
Keywords
Electrochemical Impedance Spectroscopy; Conducting Polymers; PEDOT; Doping level; Capacitive charging
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Funding
- NSF [CHE-0403806]
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We report an electrochemical impedance spectroscopy (EIS) based method to measure the doping level of conducting polymers. Using EIS the Faradaic current and the capacitive charging current can be separated without relying on any unverifiable assumptions. We demonstrate the method for three types of conducting polymer thin films that are the basis for many commercial applications (poly(3,4-ethylenedioxythiophene), poly-3-hexylthiophene and polypyrrole). (C) 2009 Elsevier B. V. All rights reserved.
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