Thermochromism in Langmuir-Blodgett films of polyalkylthiophenes

Markus Ahlskog, Jari Paloheimo, Eero Punkka, Henrik Stubb

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

Thermochromic effects in Langmuir-Blodgett (LB) films of poly(3-alkylthiophenes) mixed with arachidic acid have been studied above room temperature. The temperature-dependent optical absorption, conductivity and time constants associated with them were investigated. The absorption maximum of undoped films shifted to larger energies with increasing temperature. In complementary measurements of spin-coated thin films the shift was observed to occur at a higher temperature than in the LB films. The changes in the optical absorption and the conductivity were only partly reversible and, in addition, time-dependent. The thermal dedoping of doped LB films was also studied.

Original languageEnglish
Pages (from-to)3830 - 3835
Number of pages6
JournalSynthetic Metals
Volume57
Issue number1
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

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Langmuir Blodgett films
Langmuir-Blodgett films
optical absorption
Light absorption
conductivity
Temperature
time constant
acids
temperature
shift
room temperature
thin films
Thin films
Acids
energy

Cite this

Ahlskog, M., Paloheimo, J., Punkka, E., & Stubb, H. (1993). Thermochromism in Langmuir-Blodgett films of polyalkylthiophenes. Synthetic Metals, 57(1), 3830 - 3835. https://doi.org/10.1016/0379-6779(93)90521-W
Ahlskog, Markus ; Paloheimo, Jari ; Punkka, Eero ; Stubb, Henrik. / Thermochromism in Langmuir-Blodgett films of polyalkylthiophenes. In: Synthetic Metals. 1993 ; Vol. 57, No. 1. pp. 3830 - 3835.
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Ahlskog, M, Paloheimo, J, Punkka, E & Stubb, H 1993, 'Thermochromism in Langmuir-Blodgett films of polyalkylthiophenes', Synthetic Metals, vol. 57, no. 1, pp. 3830 - 3835. https://doi.org/10.1016/0379-6779(93)90521-W

Thermochromism in Langmuir-Blodgett films of polyalkylthiophenes. / Ahlskog, Markus; Paloheimo, Jari; Punkka, Eero; Stubb, Henrik.

In: Synthetic Metals, Vol. 57, No. 1, 1993, p. 3830 - 3835.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Thermochromism in Langmuir-Blodgett films of polyalkylthiophenes

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AU - Paloheimo, Jari

AU - Punkka, Eero

AU - Stubb, Henrik

PY - 1993

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N2 - Thermochromic effects in Langmuir-Blodgett (LB) films of poly(3-alkylthiophenes) mixed with arachidic acid have been studied above room temperature. The temperature-dependent optical absorption, conductivity and time constants associated with them were investigated. The absorption maximum of undoped films shifted to larger energies with increasing temperature. In complementary measurements of spin-coated thin films the shift was observed to occur at a higher temperature than in the LB films. The changes in the optical absorption and the conductivity were only partly reversible and, in addition, time-dependent. The thermal dedoping of doped LB films was also studied.

AB - Thermochromic effects in Langmuir-Blodgett (LB) films of poly(3-alkylthiophenes) mixed with arachidic acid have been studied above room temperature. The temperature-dependent optical absorption, conductivity and time constants associated with them were investigated. The absorption maximum of undoped films shifted to larger energies with increasing temperature. In complementary measurements of spin-coated thin films the shift was observed to occur at a higher temperature than in the LB films. The changes in the optical absorption and the conductivity were only partly reversible and, in addition, time-dependent. The thermal dedoping of doped LB films was also studied.

U2 - 10.1016/0379-6779(93)90521-W

DO - 10.1016/0379-6779(93)90521-W

M3 - Article

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SN - 0379-6779

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