Inside Front Cover: Long-Living Light-Emitting Electrochemical Cells – Control through Supramolecular Interactions (Adv. Mater. 20/2008)



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Light-emitting electrochemical cells (LECs) based on ionic transition-metal complexes are among the simplest electroluminescent devices as they use only one active component in a mono-or bi-layer architecture, operate with air-stable electrodes and are prepared using solution-based technologies. To date, the most important drawback of these molecular devices is their short lifetimes, limited to a few days. By using an ionic iridium(III) complex containing supramolecularly-interacting ligands able to form a caged structure, Henk Bolink and co-workers show on p. 3910 that the lifetime of LECs can be increased to more than 3 000 hours paving the way for low-cost and large-area lighting and signing applications.