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Enhancing outcoupling efficiency of indium-tin-oxide-free organic light-emitting diodes via nanostructured high index layers
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/content/aip/journal/apl/96/24/10.1063/1.3455098
2010-06-15
2014-09-19

Abstract

We fabricatedorganic light-emitting diodes with one-dimensional Bragg gratings as light extraction elements for substrate and waveguide modes. A layer was introduced to obtain a high refractive index contrast to the subsequent anode layer. As anode we employed a highly conductive polymer. Laser interference lithography and physical plasma etching were used to pattern gratings into the layer with a lattice constant of 370 nm and various grating depths. Mainly attributed to the outcoupling of the substrate modes, the structured devices exhibit a luminous flux which is up to four times higher compared to the unstructured reference devices.

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Scitation: Enhancing outcoupling efficiency of indium-tin-oxide-free organic light-emitting diodes via nanostructured high index layers
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/24/10.1063/1.3455098
10.1063/1.3455098
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