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Salt concentration effects in planar light-emitting electrochemical cells
Eindhoven University of Technology.
Umeå University, Faculty of Science and Technology, Department of Physics. (The Organic Photonics and Electronics Group)
Eindhoven University of Technology.
Eindhoven University of Technology.
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2011 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 21, no 10, 1795-1802 p.Article in journal (Refereed) Published
Abstract [en]

Incorporation of ions in the active layer of organic semiconductor devices may lead to attractive device properties like enhanced injection and improved carrier transport. In this paper, we investigate the effect of the salt concentration on the operation of light-emitting electrochemical cells, using experiments and numerical calculations. The current density and light emission are shown to increase linearly with increasing ion concentration over a wide range of concentrations. The increasing current is accompanied by an ion redistribution, leading to a narrowing of the recombination zone. Hence, in absence of detrimental side reactions and doping-related luminescence quenching, the ion concentration should be as high as possible.

Place, publisher, year, edition, pages
Weinheim, Germany: Wiley-VCH Verlag GmbH , 2011. Vol. 21, no 10, 1795-1802 p.
Keyword [en]
organic light-emitting diodes, organic electronics, charge transport, conjugated polymers, doping
National Category
Condensed Matter Physics
URN: urn:nbn:se:umu:diva-48544DOI: 10.1002/adfm.201002360OAI: diva2:450797
Available from: 2011-10-21 Created: 2011-10-21 Last updated: 2011-11-02Bibliographically approved

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Matyba, PiotrEdman, Ludvig
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