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14 March 2023 Deposition of ultra-thin coatings by a nature-inspired spray-on-screen technology for Organic Light Emitting Diodes
Rachith S. N. Kumar, Andrea V. Ramirez, Pieter Verding, Philippe Nivelle, Frank Renner, Jan D'Haen, Wim Deferme
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Proceedings Volume PC12418, Organic Photonic Materials and Devices XXV; PC1241806 (2023) https://doi.org/10.1117/12.2648324
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
Nanometer-thick, ultrathin coatings applied over a large area are of paramount importance for various application fields such as biomedicine, space and automotive, organic electronics, memory devices, or energy storage devices. So far wet chemical deposition as a cost-effective, scalable, and versatile method can only be used for thicker deposits, at least 30nm in thickness. In this work, the formation of uniform ultra-thin coatings with thicknesses below 15nm using a nature-inspired, roll-to-roll compatible Spray-on-Screen (SoS) technology is reported. For this, the finite micro-droplet generation of Ultrasonic Spray Coating (USSC) is combined with the coating formation from a screen printing mesh. Hydrophobic micro-threads of the mesh, resembling the micro-hair on the legs of water striders, produce millidroplets from micro droplets, and when applying an external pressure to the mesh, dynamic wetting is enforced. OLEDs are build using this Spray-on-Screen technology.
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Rachith S. N. Kumar, Andrea V. Ramirez, Pieter Verding, Philippe Nivelle, Frank Renner, Jan D'Haen, and Wim Deferme "Deposition of ultra-thin coatings by a nature-inspired spray-on-screen technology for Organic Light Emitting Diodes", Proc. SPIE PC12418, Organic Photonic Materials and Devices XXV, PC1241806 (14 March 2023); https://doi.org/10.1117/12.2648324
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KEYWORDS
Organic light emitting diodes
Composites
Electronic components
Fabrication
Organic electronics
Printing
Ultrasonics
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