Investigation of near ohmic behavior for poly(3,4-ethylenedioxythiophene): a model consistent with systematic variations in polymerization conditions
| Autor: | J. Faye Rubinson, Yohani P. Kayinamura, Marc Ovadia, Daniel H. Zavitz |
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| Rok vydání: | 2010 |
| Předmět: |
Conductive polymer
Materials science Dopant Polymers Analytical chemistry Bridged Bicyclo Compounds Heterocyclic Dielectric spectroscopy chemistry.chemical_compound PEDOT:PSS chemistry Polymerization Models Chemical Electrode Electric Impedance Combinatorial Chemistry Techniques General Materials Science Computer Simulation Ohmic contact Poly(3 4-ethylenedioxythiophene) |
| Zdroj: | ACS applied materialsinterfaces. 2(9) |
| ISSN: | 1944-8244 |
| Popis: | The impedance behavior of semiconducting polymer film electrodes based on poly(3,4-ethylenedioxythiophene) (PEDOT) in combination with a series of anionic dopants has been investigated using electrochemical impedance spectroscopy (EIS) over the frequency range from 0.1 Hz to 100 kHz. Films were electrodeposited on gold-coated Pt wire electrodes from a nonaqueous solution containing 3,4-ethylenedioxythiophene (EDOT). EIS results reveal that, under the optimal synthesis conditions, PEDOT electrodes consistently exhibit low, frequency-independent impedance over a wide frequency range (from ∼10 Hz to 100 kHz). These results suggest that the behavior originates from the two-layer homogeneous morphology of the film. A model for conduction in the films that is supported by experimental evidence is proposed, and EIS data for electrodes produced under a variety of electropolymerization conditions are presented. |
| Databáze: | OpenAIRE |
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