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Full Paper
Salt Concentration Effects in Planar Light-Emitting Electrochemical Cells
Article first published online: 22 MAR 2011
DOI: 10.1002/adfm.201002360
Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
van Reenen, S., Matyba, P., Dzwilewski, A., Janssen, R. A. J., Edman, L. and Kemerink, M. (2011), Salt Concentration Effects in Planar Light-Emitting Electrochemical Cells. Adv. Funct. Mater., 21: 1795–1802. doi: 10.1002/adfm.201002360
Publication History
- Issue published online: 16 MAY 2011
- Article first published online: 22 MAR 2011
- Manuscript Revised: 1 MAY 2011
- Manuscript Received: 9 NOV 2010
Keywords:
- organic light-emitting diodes;
- organic electronics;
- charge transport;
- conjugated polymers;
- doping
Abstract
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.