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- Sandström, Andreas, et al.
(författare)
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Separating Ion and Electron Transport: The Bilayer Light-Emitting Electrochemical Cell
- 2010
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Ingår i: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - : ACS American Chemical Society. - 0002-7863 .- 1520-5126. ; 132:19, s. 6646-
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Tidskriftsartikel (refereegranskat)abstract
- 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.
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