Synthesis and properties of FeCl4-doped polythiophene

Jan-Erik Österholm; Pentti Passiniemi; Heikki Isotalo; Henrik Stubb

doi:10.1016/0379-6779(87)90881-2

Synthesis and properties of FeCl4-doped polythiophene

Jan-Erik Österholm
, Pentti Passiniemi
, Heikki Isotalo
, Henrik Stubb

VTT Technical Research Centre of Finland

Neste Oyj

Research output: Contribution to journal › Article › Scientific

77 Citations (Scopus)

Abstract

Electrochemically synthesized polythiophene films containing BF4−-anions, PT-BF4, have been carefully reduced and re-oxidized with FeCl4-anions to obtain highly conducting PT-FeCl4-films. The maximum conductivity we have observed for this complex is 50 Scm−1 which corresponds to a maximum dopant concentration of approximately 26 mol-%.

Thermoelectric power (TEP) measurements of lightly and heavily doped PT-FeCl4 show that the positive TEP decreases drastically from 614 μV/K to 10.5 μV/K when the conductivity increases from 1.1 10−5 to 10.1 Scm−1. In heavily doped samples TEP is slightly overlinear, a phenomenon which is explained by a model based on conducting strands separated by thin potential barriers.

PT-FeCl4-films exhibit promising stability properties, the conductivity remaining in the metallic regime for at least 16 months under ambient conditions.

Original language	English
Pages (from-to)	213-218
Journal	Synthetic Metals
Volume	18
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(87)90881-2
Publication status	Published - 1987
MoE publication type	B1 Article in a scientific magazine
Event	International Conference of Science and Technology of Synthetic Metals, ICSM '86 - Kyoto, Japan Duration: 1 Jun 1986 → 6 Jun 1986

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title = "Synthesis and properties of FeCl4-doped polythiophene",

abstract = "Electrochemically synthesized polythiophene films containing BF4−-anions, PT-BF4, have been carefully reduced and re-oxidized with FeCl4-anions to obtain highly conducting PT-FeCl4-films. The maximum conductivity we have observed for this complex is 50 Scm−1 which corresponds to a maximum dopant concentration of approximately 26 mol-\%. Thermoelectric power (TEP) measurements of lightly and heavily doped PT-FeCl4 show that the positive TEP decreases drastically from 614 μV/K to 10.5 μV/K when the conductivity increases from 1.1 10−5 to 10.1 Scm−1. In heavily doped samples TEP is slightly overlinear, a phenomenon which is explained by a model based on conducting strands separated by thin potential barriers. PT-FeCl4-films exhibit promising stability properties, the conductivity remaining in the metallic regime for at least 16 months under ambient conditions.",

author = "Jan-Erik {\"O}sterholm and Pentti Passiniemi and Heikki Isotalo and Henrik Stubb",

year = "1987",

doi = "10.1016/0379-6779(87)90881-2",

language = "English",

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journal = "Synthetic Metals",

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note = "International Conference of Science and Technology of Synthetic Metals, ICSM '86, ICSM '86 ; Conference date: 01-06-1986 Through 06-06-1986",

}

TY - JOUR

T1 - Synthesis and properties of FeCl4-doped polythiophene

AU - Österholm, Jan-Erik

AU - Passiniemi, Pentti

AU - Isotalo, Heikki

AU - Stubb, Henrik

PY - 1987

Y1 - 1987

N2 - Electrochemically synthesized polythiophene films containing BF4−-anions, PT-BF4, have been carefully reduced and re-oxidized with FeCl4-anions to obtain highly conducting PT-FeCl4-films. The maximum conductivity we have observed for this complex is 50 Scm−1 which corresponds to a maximum dopant concentration of approximately 26 mol-%. Thermoelectric power (TEP) measurements of lightly and heavily doped PT-FeCl4 show that the positive TEP decreases drastically from 614 μV/K to 10.5 μV/K when the conductivity increases from 1.1 10−5 to 10.1 Scm−1. In heavily doped samples TEP is slightly overlinear, a phenomenon which is explained by a model based on conducting strands separated by thin potential barriers. PT-FeCl4-films exhibit promising stability properties, the conductivity remaining in the metallic regime for at least 16 months under ambient conditions.

AB - Electrochemically synthesized polythiophene films containing BF4−-anions, PT-BF4, have been carefully reduced and re-oxidized with FeCl4-anions to obtain highly conducting PT-FeCl4-films. The maximum conductivity we have observed for this complex is 50 Scm−1 which corresponds to a maximum dopant concentration of approximately 26 mol-%. Thermoelectric power (TEP) measurements of lightly and heavily doped PT-FeCl4 show that the positive TEP decreases drastically from 614 μV/K to 10.5 μV/K when the conductivity increases from 1.1 10−5 to 10.1 Scm−1. In heavily doped samples TEP is slightly overlinear, a phenomenon which is explained by a model based on conducting strands separated by thin potential barriers. PT-FeCl4-films exhibit promising stability properties, the conductivity remaining in the metallic regime for at least 16 months under ambient conditions.

U2 - 10.1016/0379-6779(87)90881-2

DO - 10.1016/0379-6779(87)90881-2

M3 - Article

SN - 0379-6779

VL - 18

SP - 213

EP - 218

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

T2 - International Conference of Science and Technology of Synthetic Metals, ICSM '86

Y2 - 1 June 1986 through 6 June 1986

ER -

Synthesis and properties of FeCl4-doped polythiophene

Abstract

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