Impedance spectroscopy properties of polypyrrole doped with boric acid

F. Yakuphanoglu; I. S. Yahia; B. F. Senkal; G. B. Sakr; W. A. Farooq

doi:10.1016/j.synthmet.2011.02.006

Impedance spectroscopy properties of polypyrrole doped with boric acid

F. Yakuphanoglu, I. S. Yahia, B. F. Senkal, G. B. Sakr, W. A. Farooq

Department of Chemistry

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

32 Citations (Scopus)

Abstract

The electrical conductivity and dielectric properties of polypyrrole doped with boric acid have been investigated. The direct current conductivity (dc) of the polymer increases with increasing temperature. The alternating current (ac) conductivity of the polymer obeys the power law, i.e., σ _ac(ω) = Aω^s. The alternating conductivity of polypyrrole doped with boric acid is controlled by the correlated barrier hopping model. The activation energy for alternating current mechanism decreases with increasing frequency which confirms the hopping conduction to the dominant mechanism as compared with the dc activation energy. The density of localized states N(E_F) for polypyrrole doped with boric acid was in the range of 2.5-9.2 × 10²² cm^-3 for various temperatures. The dielectric relaxation mechanism was explained on the basis of complex dielectric modulus. The imaginary modulus plot at different temperatures shows a dielectric mechanism with non-Debye relaxation. Boric acid can be a good candidate for controlling the electrical conductivity of the conducting polymer.

Original language	English
Pages (from-to)	817-822
Number of pages	6
Journal	Synthetic Metals
Volume	161
Issue number	9-10
DOIs	https://doi.org/10.1016/j.synthmet.2011.02.006
Publication status	Published - May 2011

Funding

This work was supported by the National Boron Research Institute (BOREN) (Project Number: OREN-2006-26-Ç25-19) and King Saud University under a grant number: KSU-VPP-102.

Funders	Funder number
Boren	OREN-2006-26-Ç25-19
National Boron Research Institute
King Saud University	KSU-VPP-102

Keywords

Activation energy
Conducting polymer
Conduction mechanism
dc and ac electrical conductivities
Dielectric properties and relaxation time
Impedance spectroscopy
Polypyrrole doped with boric acid

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10.1016/j.synthmet.2011.02.006

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title = "Impedance spectroscopy properties of polypyrrole doped with boric acid",

abstract = "The electrical conductivity and dielectric properties of polypyrrole doped with boric acid have been investigated. The direct current conductivity (dc) of the polymer increases with increasing temperature. The alternating current (ac) conductivity of the polymer obeys the power law, i.e., σ ac(ω) = Aωs. The alternating conductivity of polypyrrole doped with boric acid is controlled by the correlated barrier hopping model. The activation energy for alternating current mechanism decreases with increasing frequency which confirms the hopping conduction to the dominant mechanism as compared with the dc activation energy. The density of localized states N(EF) for polypyrrole doped with boric acid was in the range of 2.5-9.2 × 1022 cm-3 for various temperatures. The dielectric relaxation mechanism was explained on the basis of complex dielectric modulus. The imaginary modulus plot at different temperatures shows a dielectric mechanism with non-Debye relaxation. Boric acid can be a good candidate for controlling the electrical conductivity of the conducting polymer.",

keywords = "Activation energy, Conducting polymer, Conduction mechanism, dc and ac electrical conductivities, Dielectric properties and relaxation time, Impedance spectroscopy, Polypyrrole doped with boric acid",

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year = "2011",

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T1 - Impedance spectroscopy properties of polypyrrole doped with boric acid

AU - Yakuphanoglu, F.

AU - Yahia, I. S.

AU - Senkal, B. F.

AU - Sakr, G. B.

AU - Farooq, W. A.

PY - 2011/5

Y1 - 2011/5

N2 - The electrical conductivity and dielectric properties of polypyrrole doped with boric acid have been investigated. The direct current conductivity (dc) of the polymer increases with increasing temperature. The alternating current (ac) conductivity of the polymer obeys the power law, i.e., σ ac(ω) = Aωs. The alternating conductivity of polypyrrole doped with boric acid is controlled by the correlated barrier hopping model. The activation energy for alternating current mechanism decreases with increasing frequency which confirms the hopping conduction to the dominant mechanism as compared with the dc activation energy. The density of localized states N(EF) for polypyrrole doped with boric acid was in the range of 2.5-9.2 × 1022 cm-3 for various temperatures. The dielectric relaxation mechanism was explained on the basis of complex dielectric modulus. The imaginary modulus plot at different temperatures shows a dielectric mechanism with non-Debye relaxation. Boric acid can be a good candidate for controlling the electrical conductivity of the conducting polymer.

AB - The electrical conductivity and dielectric properties of polypyrrole doped with boric acid have been investigated. The direct current conductivity (dc) of the polymer increases with increasing temperature. The alternating current (ac) conductivity of the polymer obeys the power law, i.e., σ ac(ω) = Aωs. The alternating conductivity of polypyrrole doped with boric acid is controlled by the correlated barrier hopping model. The activation energy for alternating current mechanism decreases with increasing frequency which confirms the hopping conduction to the dominant mechanism as compared with the dc activation energy. The density of localized states N(EF) for polypyrrole doped with boric acid was in the range of 2.5-9.2 × 1022 cm-3 for various temperatures. The dielectric relaxation mechanism was explained on the basis of complex dielectric modulus. The imaginary modulus plot at different temperatures shows a dielectric mechanism with non-Debye relaxation. Boric acid can be a good candidate for controlling the electrical conductivity of the conducting polymer.

KW - Activation energy

KW - Conducting polymer

KW - Conduction mechanism

KW - dc and ac electrical conductivities

KW - Dielectric properties and relaxation time

KW - Impedance spectroscopy

KW - Polypyrrole doped with boric acid

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JO - Synthetic Metals

JF - Synthetic Metals

IS - 9-10

ER -

Impedance spectroscopy properties of polypyrrole doped with boric acid

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Keywords

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