Quest for an Appropriate Electrolyte for High-Performance Light-Emitting Electrochemical Cells
2010 (English)In: Journal of physical chemistry letters, Vol. 1, no 18, 2727-2732 p.Article in journal (Refereed) Published
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.
light-emitting electrochemical cell, operational lifetime, efficiency, side reactions, superyellow, electrolyte
IdentifiersURN: urn:nbn:se:umu:diva-35838DOI: 10.1021/jz1010797ISI: 000282017400020OAI: oai:DiVA.org:umu-35838DiVA: diva2:349629