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Quest for an Appropriate Electrolyte for High-Performance Light-Emitting Electrochemical Cells
Umeå University, Faculty of Science and Technology, Department of Physics. (The Organic Photonics and Electronics Group)
Umeå University, Faculty of Science and Technology, Department of Physics. (The Organic Photonics and Electronics Group)
2010 (English)In: Journal of physical chemistry letters, Vol. 1, no 18, 2727-2732 p.Article in journal (Refereed) Published
Abstract [en]

The electrolyte plays a critical role in the operation of light-emitting electrochemical cells (LECs), and the LEC operational stability and efficiency can be severely limited by electrolyte-induced side reactions. Here we employ a trimethylolpropane-LiCF3SO3 electrolyte with a particularly wide electrochemical stability window and for-the-purpose appropriate transport properties to minimize cathodic side reactions and to keep the emission zone free from electrolyte species during steady-state operation. We utilize an optimized blend of this electrolyte and the conjugated polymer superyellow as the active material sandwiched between air-stable electrodes, and we demonstrate that such LEC devices can exhibit a notably respectable operational lifetime (57 days of uninterrupted operation at a brightness of >100 cd/m2) and a high efficiency (>10 lm/W at >100 cd/m2).

Place, publisher, year, edition, pages
American Chemical Society , 2010. Vol. 1, no 18, 2727-2732 p.
Keyword [en]
light-emitting electrochemical cell, operational lifetime, efficiency, side reactions, superyellow, electrolyte
Identifiers
URN: urn:nbn:se:umu:diva-35838DOI: 10.1021/jz1010797ISI: 000282017400020OAI: oai:DiVA.org:umu-35838DiVA: diva2:349629
Available from: 2010-09-07 Created: 2010-09-07 Last updated: 2010-11-08Bibliographically approved

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