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Title: Up-scalable ITO-free organic light emitting diodes based on embedded inkjet-printed copper grids
Authors: Pozov, Sergey M. 
Schider, Gerburg 
Voigt, Stefanie 
Ebert, Franziska 
Popovic, Karl 
Hermerschmidt, Felix 
Georgiou, Efthymios 
Burgués-Ceballos, Ignasi 
Kinner, Lukas 
Nees, Dieter 
Stadlober, Barbara 
Rapley, Charlotte 
Ward, Richard 
Choulis, Stelios A. 
List-Kratochvil, Emil J. W. 
Boeffel, Christine 
Keywords: Organic light emitting diodes (OLEDs);Indium tin oxide (ITO);Organic optoelectronic devices
Category: Mechanical Engineering
Field: Engineering and Technology
Issue Date: Jun-2019
Source: Flexible and Printed Electronics, 2019, Volume 4, Number 2
Abstract: We report on ITO-free OLEDS with a transparent hybrid Cu nanoparticle grid/PEDOT:PSS electrode processed in ambient conditions. An experimentally based methodology was implemented, where studies on alternative PEDOT:PSS derivatives and Cu grid design were performed, to gradually increase the efficiency of lab scale ITO-free OLEDs. To further increase electrode performance, inkjet-printed (IJP) Cu-grids are embedded to flatten the electrode, reduce leakage current and enhance homogeneity and efficiency. Finally, embedded Cu based ITO-free OLEDs showed current and power efficiencies comparable to reference ITO-based OLEDs. Methods to manufacture large area flat embedded IJP Cu-electrodes on glass and flexible substrates are presented and upscaling prospects of the proposed ITO-free electrode are discussed.
ISSN: 2058-8585
DOI: 10.1088/2058-8585/ab17a5
Rights: © 2019 IOP Publishing Ltd
Type: Article
Appears in Collections:Άρθρα/Articles

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