The dc conductivity of polyphenylacetylene below room temperature

A. P. Bhatt; W. A. Anderson; E. T. Kang; P. Ehrlich

doi:10.1063/1.332574

The dc conductivity of polyphenylacetylene below room temperature

A. P. Bhatt
, W. A. Anderson
, E. T. Kang
, P. Ehrlich

Department of Electrical Engineering

SUNY Buffalo

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

11 Scopus citations

Abstract

The temperature dependence of the dc conductivity for doped and undoped cis-polyphenylacetylene (PPA) is analyzed at temperatures of 110 to 300 K. The dc conductivity (σ_dc) data of arsenic pentafluoride-doped and iodine-doped samples suggest two major current conduction processes separated by a characteristic temperature (T_c) of about 257 K, which is independent of the doping level. At T<T_c,σ_dc is independent of the temperature within experimental error. At T>T_c, σ_dc is activated with an activation energy that, for PPA-AsF₅, varies from 0.86 eV to 0.51 eV for doping levels of 2×10^-3 to 7×10^-2 moles dopant/moles monomer, respectively. PPA annealed at 130 °C, which is known to undergo isomerization and cyclization reactions, has a T_c of about 210 K, and σ_dc does not respond to doping. Possible conduction mechanisms are discussed.

Original language	English
Pages (from-to)	3973-3976
Number of pages	4
Journal	Journal of Applied Physics
Volume	54
Issue number	7
DOIs	https://doi.org/10.1063/1.332574
State	Published - 1983

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title = "The dc conductivity of polyphenylacetylene below room temperature",

abstract = "The temperature dependence of the dc conductivity for doped and undoped cis-polyphenylacetylene (PPA) is analyzed at temperatures of 110 to 300 K. The dc conductivity (σdc) data of arsenic pentafluoride-doped and iodine-doped samples suggest two major current conduction processes separated by a characteristic temperature (Tc) of about 257 K, which is independent of the doping level. At Tc,σdc is independent of the temperature within experimental error. At T>Tc, σdc is activated with an activation energy that, for PPA-AsF5, varies from 0.86 eV to 0.51 eV for doping levels of 2{\texttimes}10-3 to 7{\texttimes}10-2 moles dopant/moles monomer, respectively. PPA annealed at 130 °C, which is known to undergo isomerization and cyclization reactions, has a Tc of about 210 K, and σdc does not respond to doping. Possible conduction mechanisms are discussed.",

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T1 - The dc conductivity of polyphenylacetylene below room temperature

AU - Bhatt, A. P.

AU - Anderson, W. A.

AU - Kang, E. T.

AU - Ehrlich, P.

PY - 1983

Y1 - 1983

N2 - The temperature dependence of the dc conductivity for doped and undoped cis-polyphenylacetylene (PPA) is analyzed at temperatures of 110 to 300 K. The dc conductivity (σdc) data of arsenic pentafluoride-doped and iodine-doped samples suggest two major current conduction processes separated by a characteristic temperature (Tc) of about 257 K, which is independent of the doping level. At Tc,σdc is independent of the temperature within experimental error. At T>Tc, σdc is activated with an activation energy that, for PPA-AsF5, varies from 0.86 eV to 0.51 eV for doping levels of 2×10-3 to 7×10-2 moles dopant/moles monomer, respectively. PPA annealed at 130 °C, which is known to undergo isomerization and cyclization reactions, has a Tc of about 210 K, and σdc does not respond to doping. Possible conduction mechanisms are discussed.

AB - The temperature dependence of the dc conductivity for doped and undoped cis-polyphenylacetylene (PPA) is analyzed at temperatures of 110 to 300 K. The dc conductivity (σdc) data of arsenic pentafluoride-doped and iodine-doped samples suggest two major current conduction processes separated by a characteristic temperature (Tc) of about 257 K, which is independent of the doping level. At Tc,σdc is independent of the temperature within experimental error. At T>Tc, σdc is activated with an activation energy that, for PPA-AsF5, varies from 0.86 eV to 0.51 eV for doping levels of 2×10-3 to 7×10-2 moles dopant/moles monomer, respectively. PPA annealed at 130 °C, which is known to undergo isomerization and cyclization reactions, has a Tc of about 210 K, and σdc does not respond to doping. Possible conduction mechanisms are discussed.

UR - https://www.scopus.com/pages/publications/0020781528

U2 - 10.1063/1.332574

DO - 10.1063/1.332574

M3 - Article

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SN - 0021-8979

VL - 54

SP - 3973

EP - 3976

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 7

ER -

The dc conductivity of polyphenylacetylene below room temperature

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