DataVXAdvanced Optical MaterialsPaper
journal article·2020-12Open access

Efficient Sky‐Blue Organic Light‐Emitting Diodes Using a Highly Horizontally Oriented Thermally Activated Delayed Fluorescence Emitter

Zhen Zhang, Ettore Crovini, Paloma L. dos Santos, Bilal A. Naqvi, David B. Cordes, Alexandra M. Z. Slawin, Prakhar Sahay, Wolfgang Brütting, Ifor D. W. Samuel, Stefan Bräse, Eli Zysman‐Colman

Advanced Optical Materials· Volume 8· Issue 23
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Source abstract

Abstract

Abstract Organic thermally activated delayed fluorescent (TADF) materials can harvest 100% of the electrically generated excitons as a result of their small singlet–triplet energy difference. However, maximizing the external quantum efficiency (EQE) of a device also requires enhancing the light out‐coupling efficiency. This work presents a new acceptor–donor–acceptor (ADA) emitter employing an indolocarbazole donor and diphenyltriazine acceptors that show nearly‐completely horizontal orientation regardless of the host matrix, leading to a sky‐blue organic light‐emitting diode (λEL = 483 nm, CIE coordinates of 0.17, 0.32) with EQEMAX of 22.1%, a maximum luminance of 7800 cd m−2, and blue emission.
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Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Luminescence and Fluorescent Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz‐Haber‐Weg 6 Karlsruhe 76131 Germany

Organic Semiconductor Centre, EaStCHEM School of Chemistry University of St Andrews Fife St Andrews KY16 9ST UK

Organic Semiconductor Centre, SUPA, School of Physics and Astronomy University of St Andrews North Haugh St Andrews KY16 9SS UK

Experimental Physics IV, Institute of Physics University of Augsburg Universitätsstr. 1 Augsburg 86159 Germany

Institute of Biological and Chemical Systems – Functional Molecular Systems (IBCS‐FMS) Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen D‐76344 Germany

Funding

Helmholtz-Gemeinschaft · Karlsruher Institut für Technologie · Deutsche Forschungsgemeinschaft · Engineering and Physical Sciences Research Council · China Scholarship Council · Horizon 2020 Framework Programme

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