Metallic temperature dependence of resistivity in perchlorate doped polyacetylene

Y. W. Park; E. S. Choi; D. S. Suh

doi:10.1016/s0379-6779(98)00078-2

Metallic temperature dependence of resistivity in perchlorate doped polyacetylene

Y. W. Park, E. S. Choi, D. S. Suh

Department of Physics

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

45 Scopus citations

Abstract

We have measured the electrical resistivity (ρ) and thermoelectric power (TEP) of the perchlorate (ClO₄^-) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples (σ_RT ≈ 41 000 S/cm), the temperature dependence of the four-probe resistivity shows positive temperature coefficient of resistivity (TCR) from T = 1.5 to 300 K. For the less conducting samples, the four-probe resistivity data show the crossover of TCR with a broad minimum peak at T = T* ≈ 200 K. For samples of σ_RT ≥ 20 000 S/cm, ρ(1.5 K) / ρ(300 K) < 1, i.e., the resistivity at 1.5 K is lower than the room temperature resistivity value. The temperature dependence of the TEP shows diffusive linear metallic TEP becoming temperature independent below 40 K. Unlike the others who used Cu(ClO₄)₂ for the ClO₄^- doping, the initial doping material we used is anhydrous Fe(ClO₄)₃ which is crucial to obtain positive TCR from T = 1.5 to 300 K.

Original language	English
Pages (from-to)	81-86
Number of pages	6
Journal	Synthetic Metals
Volume	96
Issue number	1
DOIs	https://doi.org/10.1016/s0379-6779(98)00078-2
State	Published - 15 Jul 1998

Bibliographical note

Funding Information:
The ICP emissiona nd EDS analysisf or dopedp olyace-tylne were done at the Inter-UniversitCye nterf or Natural ScienceR esearchFa cilitiesS, eoulN ationaUl niversityT. his work was supportebdy the Korea Sciencea ndEngineering Foundation (KOSEF) and the Ministry of Education (MOE), Korea.

Keywords

Conductivity
Doping
Perchlorate
Polyacetylene
Temperature dependence

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title = "Metallic temperature dependence of resistivity in perchlorate doped polyacetylene",

abstract = "We have measured the electrical resistivity (ρ) and thermoelectric power (TEP) of the perchlorate (ClO4-) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples (σRT ≈ 41 000 S/cm), the temperature dependence of the four-probe resistivity shows positive temperature coefficient of resistivity (TCR) from T = 1.5 to 300 K. For the less conducting samples, the four-probe resistivity data show the crossover of TCR with a broad minimum peak at T = T* ≈ 200 K. For samples of σRT ≥ 20 000 S/cm, ρ(1.5 K) / ρ(300 K) < 1, i.e., the resistivity at 1.5 K is lower than the room temperature resistivity value. The temperature dependence of the TEP shows diffusive linear metallic TEP becoming temperature independent below 40 K. Unlike the others who used Cu(ClO4)2 for the ClO4- doping, the initial doping material we used is anhydrous Fe(ClO4)3 which is crucial to obtain positive TCR from T = 1.5 to 300 K.",

keywords = "Conductivity, Doping, Perchlorate, Polyacetylene, Temperature dependence",

author = "Park, {Y. W.} and Choi, {E. S.} and Suh, {D. S.}",

note = "Funding Information: The ICP emissiona nd EDS analysisf or dopedp olyace-tylne were done at the Inter-UniversitCye nterf or Natural ScienceR esearchFa cilitiesS, eoulN ationaUl niversityT. his work was supportebdy the Korea Sciencea ndEngineering Foundation (KOSEF) and the Ministry of Education (MOE), Korea.",

year = "1998",

month = jul,

day = "15",

doi = "10.1016/s0379-6779(98)00078-2",

language = "English",

volume = "96",

pages = "81--86",

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TY - JOUR

T1 - Metallic temperature dependence of resistivity in perchlorate doped polyacetylene

AU - Park, Y. W.

AU - Choi, E. S.

AU - Suh, D. S.

N1 - Funding Information: The ICP emissiona nd EDS analysisf or dopedp olyace-tylne were done at the Inter-UniversitCye nterf or Natural ScienceR esearchFa cilitiesS, eoulN ationaUl niversityT. his work was supportebdy the Korea Sciencea ndEngineering Foundation (KOSEF) and the Ministry of Education (MOE), Korea.

PY - 1998/7/15

Y1 - 1998/7/15

N2 - We have measured the electrical resistivity (ρ) and thermoelectric power (TEP) of the perchlorate (ClO4-) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples (σRT ≈ 41 000 S/cm), the temperature dependence of the four-probe resistivity shows positive temperature coefficient of resistivity (TCR) from T = 1.5 to 300 K. For the less conducting samples, the four-probe resistivity data show the crossover of TCR with a broad minimum peak at T = T* ≈ 200 K. For samples of σRT ≥ 20 000 S/cm, ρ(1.5 K) / ρ(300 K) < 1, i.e., the resistivity at 1.5 K is lower than the room temperature resistivity value. The temperature dependence of the TEP shows diffusive linear metallic TEP becoming temperature independent below 40 K. Unlike the others who used Cu(ClO4)2 for the ClO4- doping, the initial doping material we used is anhydrous Fe(ClO4)3 which is crucial to obtain positive TCR from T = 1.5 to 300 K.

AB - We have measured the electrical resistivity (ρ) and thermoelectric power (TEP) of the perchlorate (ClO4-) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples (σRT ≈ 41 000 S/cm), the temperature dependence of the four-probe resistivity shows positive temperature coefficient of resistivity (TCR) from T = 1.5 to 300 K. For the less conducting samples, the four-probe resistivity data show the crossover of TCR with a broad minimum peak at T = T* ≈ 200 K. For samples of σRT ≥ 20 000 S/cm, ρ(1.5 K) / ρ(300 K) < 1, i.e., the resistivity at 1.5 K is lower than the room temperature resistivity value. The temperature dependence of the TEP shows diffusive linear metallic TEP becoming temperature independent below 40 K. Unlike the others who used Cu(ClO4)2 for the ClO4- doping, the initial doping material we used is anhydrous Fe(ClO4)3 which is crucial to obtain positive TCR from T = 1.5 to 300 K.

KW - Conductivity

KW - Doping

KW - Perchlorate

KW - Polyacetylene

KW - Temperature dependence

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U2 - 10.1016/s0379-6779(98)00078-2

DO - 10.1016/s0379-6779(98)00078-2

M3 - Article

AN - SCOPUS:0032108952

SN - 0379-6779

VL - 96

SP - 81

EP - 86

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1

ER -

Metallic temperature dependence of resistivity in perchlorate doped polyacetylene

Abstract

Bibliographical note

Keywords

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