Universität zu Köln

Umbach, Thorsten Erich, Roellgen, Stefan, Schneider, Stefan, Klesper, Heike, Umbach, Anne Manuela and Meerholz, Klaus ORCID: 0000-0001-7450-4672 (2020). Low-Refractive Index Layers in Organic Light-Emitting Diodes via Electrospray Deposition for Enhanced Outcoupling Efficiencies. Adv. Eng. Mater., 22 (5). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1527-2648

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Abstract

Organic light-emitting diodes (OLEDs) still suffer from limited outcoupling efficiencies. Herein, a novel technology for the enhancement of the outcoupling efficiency of OLED devices is presented. By means of electrospray deposition (ESD), the active hole-transport layer (HTL) is modified to have a reduced effective refractive index due to its porosity. A green-emitting stack is tailored to demonstrate this effect, whereas additional haze effects are to be prevented. The introduction of a low-index HTL results in a more efficient light extraction by a factor of 1.05 showing excellent agreement between experiment and simulation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Umbach, Thorsten Erich UNSPECIFIED UNSPECIFIED UNSPECIFIED Roellgen, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Schneider, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Klesper, Heike UNSPECIFIED UNSPECIFIED UNSPECIFIED Umbach, Anne Manuela UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, Klaus UNSPECIFIED orcid.org/0000-0001-7450-4672 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-348976
DOI:	10.1002/adem.201900897
Journal or Publication Title:	Adv. Eng. Mater.
Volume:	22
Number:	5
Date:	2020
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1527-2648
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EXTRACTION; OLEDS; SCATTERING; COHERENT; CHARGE; MODES; COLOR Multiple languages Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/34897