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Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes

Organic light-emitting diodes (OLEDs) suffer from notorious light trapping, resulting in only moderate external quantum efficiencies. Here, we report a facile, scalable, lithography-free method to generate controllable nanostructures with directional randomness and dimensional order, significantly b...

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Autores principales: Li, Yungui, Kovačič, Milan, Westphalen, Jasper, Oswald, Steffen, Ma, Zaifei, Hänisch, Christian, Will, Paul-Anton, Jiang, Lihui, Junghaehnel, Manuela, Scholz, Reinhard, Lenk, Simone, Reineke, Sebastian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611821/
https://www.ncbi.nlm.nih.gov/pubmed/31278271
http://dx.doi.org/10.1038/s41467-019-11032-z
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author Li, Yungui
Kovačič, Milan
Westphalen, Jasper
Oswald, Steffen
Ma, Zaifei
Hänisch, Christian
Will, Paul-Anton
Jiang, Lihui
Junghaehnel, Manuela
Scholz, Reinhard
Lenk, Simone
Reineke, Sebastian
author_facet Li, Yungui
Kovačič, Milan
Westphalen, Jasper
Oswald, Steffen
Ma, Zaifei
Hänisch, Christian
Will, Paul-Anton
Jiang, Lihui
Junghaehnel, Manuela
Scholz, Reinhard
Lenk, Simone
Reineke, Sebastian
author_sort Li, Yungui
collection PubMed
description Organic light-emitting diodes (OLEDs) suffer from notorious light trapping, resulting in only moderate external quantum efficiencies. Here, we report a facile, scalable, lithography-free method to generate controllable nanostructures with directional randomness and dimensional order, significantly boosting the efficiency of white OLEDs. Mechanical deformations form on the surface of poly(dimethylsiloxane) in response to compressive stress release, initialized by reactive ions etching with periodicity and depth distribution ranging from dozens of nanometers to micrometers. We demonstrate the possibility of independently tuning the average depth and the dominant periodicity. Integrating these nanostructures into a two-unit tandem white organic light-emitting diode, a maximum external quantum efficiency of 76.3% and a luminous efficacy of 95.7 lm W(−1) are achieved with extracted substrate modes. The enhancement factor of 1.53 ± 0.12 at 10,000 cd m(−2) is obtained. An optical model is built by considering the dipole orientation, emitting wavelength, and the dipole position on the sinusoidal nanotexture.
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spelling pubmed-66118212019-07-08 Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes Li, Yungui Kovačič, Milan Westphalen, Jasper Oswald, Steffen Ma, Zaifei Hänisch, Christian Will, Paul-Anton Jiang, Lihui Junghaehnel, Manuela Scholz, Reinhard Lenk, Simone Reineke, Sebastian Nat Commun Article Organic light-emitting diodes (OLEDs) suffer from notorious light trapping, resulting in only moderate external quantum efficiencies. Here, we report a facile, scalable, lithography-free method to generate controllable nanostructures with directional randomness and dimensional order, significantly boosting the efficiency of white OLEDs. Mechanical deformations form on the surface of poly(dimethylsiloxane) in response to compressive stress release, initialized by reactive ions etching with periodicity and depth distribution ranging from dozens of nanometers to micrometers. We demonstrate the possibility of independently tuning the average depth and the dominant periodicity. Integrating these nanostructures into a two-unit tandem white organic light-emitting diode, a maximum external quantum efficiency of 76.3% and a luminous efficacy of 95.7 lm W(−1) are achieved with extracted substrate modes. The enhancement factor of 1.53 ± 0.12 at 10,000 cd m(−2) is obtained. An optical model is built by considering the dipole orientation, emitting wavelength, and the dipole position on the sinusoidal nanotexture. Nature Publishing Group UK 2019-07-05 /pmc/articles/PMC6611821/ /pubmed/31278271 http://dx.doi.org/10.1038/s41467-019-11032-z Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Li, Yungui
Kovačič, Milan
Westphalen, Jasper
Oswald, Steffen
Ma, Zaifei
Hänisch, Christian
Will, Paul-Anton
Jiang, Lihui
Junghaehnel, Manuela
Scholz, Reinhard
Lenk, Simone
Reineke, Sebastian
Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes
title Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes
title_full Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes
title_fullStr Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes
title_full_unstemmed Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes
title_short Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes
title_sort tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611821/
https://www.ncbi.nlm.nih.gov/pubmed/31278271
http://dx.doi.org/10.1038/s41467-019-11032-z
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