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A lot of research, mostly using electron‐injection layers (EILs) composed of alkali‐metal compounds has been reported with a view to increase the efficiency of solution‐processed organic light‐emitting devices (OLEDs). However, these materials have intractable properties, such as a strong affinity for moisture, which cause the degradation of OLEDs. Consequently, optimal EIL materials should exhibit...
Hydrophobic polymeric ionic liquids, poly(diallyldimethylammonium) bis(trifluoromethanesulfonyl)imide (poly(DDA)TFSI) exhibit good work‐function tunability and hydrophobic properties. A polymer light‐emitting device with poly(DDA)TFSI as the electron‐injection layer, described by Satoru Ohisa, Junji Kido, and co‐workers in article number 1705915, achieves excellent air‐storage stability and electroluminescence...
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