期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 132, 期 19, 页码 6646-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja102038e
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资金
- Vetenskapsradet
- Carl Tryggers Stiftelse
- Umea University
- Knut and Alice Wallenberg Foundation
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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