AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films

C. Y. Lee; H. M. Kim; J. W. Park; Y. S. Gal; J. I. Jin; J. Joo

doi:10.1016/S0379-6779(00)00548-8

AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films

C. Y. Lee, H. M. Kim, J. W. Park, Y. S. Gal, J. I. Jin, J. Joo

Department of Physics

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

35 Citations (Scopus)

Abstract

AC electrical properties of various conjugated polymers such as emeraldine base form of polyaniline, polyacetylene derivatives, and poly(1,4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time τ follows Arrhenius equation τ = τ₀ exp(E_a/k_BT). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (≤10 kHz) and a power-law behavior (σ approximately ω+s$/) in high-frequency regime (≥100 kHz). For the applications of multilayer films of conducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (≥1 GHz) based on plane wave theory.

Original language	English
Pages (from-to)	109-113
Number of pages	5
Journal	Synthetic Metals
Volume	117
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(00)00548-8
Publication status	Published - 2001 Feb 15

Bibliographical note

Funding Information:
This study was supported by Advanced Materials Chemistry Research Center in Korea University (Korea Research Foundation, 96-05-D-1134).

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films",

abstract = "AC electrical properties of various conjugated polymers such as emeraldine base form of polyaniline, polyacetylene derivatives, and poly(1,4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time τ follows Arrhenius equation τ = τ0 exp(Ea/kBT). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (≤10 kHz) and a power-law behavior (σ approximately ω+s$/) in high-frequency regime (≥100 kHz). For the applications of multilayer films of conducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (≥1 GHz) based on plane wave theory.",

author = "Lee, {C. Y.} and Kim, {H. M.} and Park, {J. W.} and Gal, {Y. S.} and Jin, {J. I.} and J. Joo",

note = "Funding Information: This study was supported by Advanced Materials Chemistry Research Center in Korea University (Korea Research Foundation, 96-05-D-1134).",

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AU - Lee, C. Y.

AU - Kim, H. M.

AU - Park, J. W.

AU - Gal, Y. S.

AU - Jin, J. I.

AU - Joo, J.

N1 - Funding Information: This study was supported by Advanced Materials Chemistry Research Center in Korea University (Korea Research Foundation, 96-05-D-1134).

PY - 2001/2/15

Y1 - 2001/2/15

N2 - AC electrical properties of various conjugated polymers such as emeraldine base form of polyaniline, polyacetylene derivatives, and poly(1,4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time τ follows Arrhenius equation τ = τ0 exp(Ea/kBT). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (≤10 kHz) and a power-law behavior (σ approximately ω+s$/) in high-frequency regime (≥100 kHz). For the applications of multilayer films of conducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (≥1 GHz) based on plane wave theory.

AB - AC electrical properties of various conjugated polymers such as emeraldine base form of polyaniline, polyacetylene derivatives, and poly(1,4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time τ follows Arrhenius equation τ = τ0 exp(Ea/kBT). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (≤10 kHz) and a power-law behavior (σ approximately ω+s$/) in high-frequency regime (≥100 kHz). For the applications of multilayer films of conducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (≥1 GHz) based on plane wave theory.

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VL - 117

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JO - Synthetic Metals

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ER -

AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films

Abstract

Bibliographical note

ASJC Scopus subject areas

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