Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 1, Issue 18, Pages 2727-2732Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz1010797
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Funding
- Kempestiftelserna
- Carl Tryggers Stiftelse
- Swedish Research Council (Vetenskapsradet)
- Knut and Alice Wallenberg Foundation
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The electrolyte plays a critical role in the operation alight-emitting electrochemical cells (LECs), and the LEC operational stability and efficiency can be severely limited by electrolyte-induced side reactions. Here we employ a trimethylolpropane-LiCF3SO3 electrolyte with a particularly wide electrochemical stability window and for-the-purpose appropriate transport properties to minimize cathodic side reactions and to keep the emission zone free from electrolyte species during steady-state operation. We utilize an optimized blend of this electrolyte and the conjugated polymer superyellow as the active material sandwiched between air-stable electrodes, and we demonstrate that such LEC devices can exhibit a notably respectable operational lifetime (57 days of uninterrupted operation at a brightness of > 100 cd/m(2)) and a high efficiency (> 10 lm/W at > 100 cd/m(2)).
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