Enhanced light extraction in ITO-free OLEDs using double-sided printed electrodes

Vincent Reboud; Ali Z. Khokhar; Borja Sepúlveda; Damian Dudek; Tim Kehoe; John Cuffe; Nikolaos Kehagias; Mónica Lira-Cantu; Nikolaj Gadegaard; Valentina Grasso; Vito Lambertini; Clivia M. Sotomayor Torres

doi:10.1039/C2NR12068B

Enhanced light extraction in ITO-free OLEDs using double-sided printed electrodes

Vincent Reboud,*^ab Ali Z. Khokhar,^c Borja Sepúlveda,^d Damian Dudek,†^a Tim Kehoe,^a John Cuffe,^a Nikolaos Kehagias,^a Mónica Lira-Cantu,^e Nikolaj Gadegaard,^c Valentina Grasso,^f Vito Lambertini^f and Clivia M. Sotomayor Torres^agh

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* Corresponding authors

^a Catalan Institute of Nanotechnology, Campus UAB, Edifici CM3, 08193 Bellaterra (Barcelona), Spain

^b CEA-LETI-Minatec Grenoble, 17 rue des Martyrs, 38054 Grenoble, France
E-mail: vincent.reboud@cea.fr

^c Division of Biomedical Engineering, Rankine Building, University of Glasgow, UK

^d NanoBiosensors and Bioanalytical Applications Group, Research Centre on Nanoscience and Nanotechnology (CIN2, CSIC), Campus UAB, Edifici ETSE2, 08193 Bellaterra (Barcelona), Spain

^e Laboratory of Nanostructured Materials for Photovoltaic Energy, Research Centre on Nanoscience and Nanotechnology (CIN2, CSIC), Campus UAB, Edifici ETSE2, 08193 Bellaterra (Barcelona), Spain

^f Centro Ricerche FIAT, Strada Torino 50, 10043 Orbassano (TO), Italy

^g Catalan Institute for Research and Advanced Studies ICREA, 08010 Barcelona, Spain

^h Department of Physics, Universitat Autonoma de Barcelona, 08193 Bellaterra (Barcelona), Spain

Abstract

We show how nanoimprint lithographic techniques are particularly suited for the realization of OLED device structures. We tested them to realize nanopatterned metallic electrodes containing photonic crystals to couple the light out and plasmonic crystals showing extraordinary transmission. At similar current densities, a two-fold electroluminescence is achieved with devices having double-sided structured metallic electrodes as compared to a control OLED with an ITO anode. The use of combined nanoimprint lithography processes has the potential to expand the performance range of various organic optoelectronic devices.

Nanoscale

Enhanced light extraction in ITO-free OLEDs using double-sided printed electrodes

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Enhanced light extraction in ITO-free OLEDs using double-sided printed electrodes

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