Understanding volumetric capacitance in conducting polymers

Christopher M. Proctor; Jonathan Rivnay; George G. Malliaras

doi:10.1002/polb.24038

Understanding volumetric capacitance in conducting polymers

Christopher M. Proctor, Jonathan Rivnay, George G. Malliaras^*

^*Corresponding author for this work

Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

Recent measurements in poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films show that capacitance scales with film volume. We discuss the ramifications of this finding and propose a simple model that describes capacitance in terms of sites in which ions injected from the electrolyte replace holes that are extracted from the film by a metal contact. We propose that volumetric capacitance is inversely proportional to the average distance between these sites.

Original language	English (US)
Pages (from-to)	1433-1436
Number of pages	4
Journal	Journal of Polymer Science, Part B: Polymer Physics
Volume	54
Issue number	15
DOIs	https://doi.org/10.1002/polb.24038
State	Published - Aug 1 2016

Keywords

bioelectronics
conducting polymers
electrochemical impedance
mixed conductivity
organic bioelectronics

ASJC Scopus subject areas

Condensed Matter Physics
Physical and Theoretical Chemistry
Polymers and Plastics
Materials Chemistry

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AU - Malliaras, George G.

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N2 - Recent measurements in poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films show that capacitance scales with film volume. We discuss the ramifications of this finding and propose a simple model that describes capacitance in terms of sites in which ions injected from the electrolyte replace holes that are extracted from the film by a metal contact. We propose that volumetric capacitance is inversely proportional to the average distance between these sites.

AB - Recent measurements in poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films show that capacitance scales with film volume. We discuss the ramifications of this finding and propose a simple model that describes capacitance in terms of sites in which ions injected from the electrolyte replace holes that are extracted from the film by a metal contact. We propose that volumetric capacitance is inversely proportional to the average distance between these sites.

KW - bioelectronics

KW - conducting polymers

KW - electrochemical impedance

KW - mixed conductivity

KW - organic bioelectronics

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JF - Journal of Polymer Science, Part B: Polymer Physics

SN - 0887-6266

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Understanding volumetric capacitance in conducting polymers

Abstract

Keywords

ASJC Scopus subject areas

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