Separating Ion and Electron Transport: The Bilayer Light-Emitting Electrochemical Cell
2010 (English)In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, ISSN 0002-7863, Vol. 132, no 19, 6646-+ p.Article in journal (Refereed) Published
The current generation of polymer light-emitting electrochemical cells (LECs) suffers from insufficient stability during operation. One identified culprit is the active material, which comprises an intimate blend between an ion-conducting electrolyte and an electron-transporting conjugated polymer, as it tends to undergo phase separation during long-term operation and the intimate contact between the ion- and electron-transporting components provokes side reactions. To address these stability issues, we present here a bilayer LEC structure in which the electrolyte is spatially separated from the conjugated polymer. We demonstrate that employing this novel device structure, with its clearly separated ion- and electron-transport paths, leads to distinctly improved LEC performance in the form of decreased turn-on time and improved light emission. We also point out that it will allow for the utilization of combinations of active materials having mutually incompatible solubilities.
Place, publisher, year, edition, pages
ACS American Chemical Society , 2010. Vol. 132, no 19, 6646-+ p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-56797DOI: 10.1021/ja102038eISI: 000277721500017OAI: oai:DiVA.org:liu-56797DiVA: diva2:322265