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Gerardo Hernandez-Sosa, Nils Bornemann, Ingo Ringle, Michaela Agari, Edgar Dörsam, Norman Mechau and Uli Lemmer Rheological and Drying Considerations for Uniformly Gravure-Printed Layers: Towards Large-Area Flexible Organic Light-Emitting Diodes Advanced Functional Materials 23

Version of Record online: 7 FEB 2013 | DOI: 10.1002/adfm.201202862

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The interplay between surface tension, viscosity, and drying time of organic semiconducting inks is taken into account to fabricate homogeneous active layers for organic light-emitting diodes (OLEDs) by gravure printing. The optimal formulation of the ink is identified when its properties allow a film leveling time shorter that the critical “freezing” time.

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