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Thermal control of near‐infrared and visible electroluminescence in alkyl‐phenyl substituted polythiophenes
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-5154-0291
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
Chalmers Tekniska Högskola.
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1994 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 65, no 12, 1489-1491 p.Article in journal (Refereed) Published
Abstract [en]

We report electroluminescence from a regioregular alkyl-phenyl substituted polythiophene. The polymer film exists in two forms, giving widely different optical absorption, as well as photoluminescence and electroluminescence spectra. In the low-bandgap form, we observe high emission intensity centered at 1.55 eV (800 nm), well into the infrared, while the high-bandgap form gives a maximum at 1.85 eV (670 nm). The conversion from the high-bandgap form to the low-bandgap form can be done by thermal treatment of the polymer light emitting diodes.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 1994. Vol. 65, no 12, 1489-1491 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-74938DOI: 10.1063/1.112021ISI: A1994PG92500005OAI: oai:DiVA.org:liu-74938DiVA: diva2:497053
Available from: 2012-02-10 Created: 2012-02-10 Last updated: 2017-12-07

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Berggren, MagnusInganäs, Olle

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