Phosphorescent OLEDs (PhOLEDs) which use triplet excitons offer superior performance compared to conventional fluorescent OLEDs; however, most of the high-performance PhOLEDs reported so far have been based on vacuum-deposited small-molecules involving thermal evaporation processes to create multilayered structures. Solution-based processes should provide a cheaper alternative to vacuum deposition for fabricating PhOLEDs.
In this Hot Paper Taeshik Earmme and Samson A. Jenekhe report high-performance multilayered PhOLEDs fabricated by orthogonal sequential solution-processing of a triplet-emitter-doped poly(N-vinylcarbazole)(PVK)-based emissive layer and widely used commercial small-molecule electron-transport materials. The team say that their results demonstrate that commercial small-molecule electron-transport materials can be readily solution-deposited to realise high-performance PhOLEDs. Interested to know more? Read the full article for free until 10th April.
High-performance multilayered phosphorescent OLEDs by solution-processed commercial electron-transport materials: Taeshik Earmme and Samson A. Jenekhe, J. Mater. Chem., 2012, 22, 4660-4668.
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