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Publication type: Article in scientific journal
Type of review: Editorial review
Title: Routes for efficiency enhancement in fluorescent TADF exciplex host OLEDs gained from an electro‐optical device model
Authors: Regnat, Markus
Pernstich, Kurt P.
Kim, Kwon‐Hyeon
Kim, Jang‐Joo
Nüesch, Frank
Ruhstaller, Beat
et. al: No
DOI: 10.1002/aelm.201900804
Published in: Advanced Electronic Materials
Volume(Issue): 6
Issue: 2
Pages: 1900804
Issue Date: Dec-2019
Publisher / Ed. Institution: Wiley
ISSN: 2199-160X
Language: English
Subjects: OLED; TADF; Simulation; Efficiency
Subject (DDC): 
Abstract: Fluorescence-based organic light-emitting diodes (OLEDs) using thermally activated delayed fluorescence (TADF) have increasingly attracted attention in research and industry. One method to implement TADF is based on an emitter layer composed of an exciplex host and a fluorescent dopant. Even though the experimental realization of this concept has demonstrated promising external quantum efficiencies, the full potential of this approach has not yet been assessed. To this end, a comprehensive electro-optical device model accounting for the full exciton dynamics including triplet harvesting and exciton quenching is presented. The model parameters are fitted to multiple output characteristics of an OLED comprising a TADF exciplex host with a fluorescent emitter, showing an external quantum efficiency of >10%. With the model at hand, an emission zone analysis and a parameter study are performed, and possible routes for further efficiency enhancement are presented.
Fulltext version: Published version
License (according to publishing contract): CC BY 4.0: Attribution 4.0 International
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Appears in Collections:Publikationen School of Engineering

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