Keum, Changmin, Becker, David, Archer, Emily ORCID: 0000-0001-8513-3918, Bock, Harald, Kitzerow, Heinz, Gather, Malte C. and Murawski, Caroline ORCID: 0000-0002-3496-4110 (2020). Organic Light-Emitting Diodes Based on a Columnar Liquid-Crystalline Perylene Emitter. Adv. Opt. Mater., 8 (17). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 2195-1071

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Abstract

Liquid crystalline materials possess great potential as emitters in organic light-emitting diodes (OLEDs) due to their self-assembling property, which may lead to anisotropic films and improved charge transport. Here, the key photophysical properties of the columnar liquid crystalline emitter perylene-3,4,9,10-tetracarboxylic tetraethyl ester (PTCTE) are investigated and the material is implemented into OLEDs. It is found that vacuum-deposited PTCTE films exhibit preferential horizontal orientation of the transition dipole moment. Embedding the emitter into different host materials leads to increased photoluminescence quantum yield but reduces molecular orientation compared to the neat film. OLEDs containing PTCTE doped into an exciplex-forming co-host achieve very high luminance exceeding 10 000 cd m(-2)at 5.7 V, which is among the best performances of OLEDs based on columnar liquid crystalline emitters reported so far.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Keum, ChangminUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Becker, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Archer, EmilyUNSPECIFIEDorcid.org/0000-0001-8513-3918UNSPECIFIED
Bock, HaraldUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kitzerow, HeinzUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gather, Malte C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Murawski, CarolineUNSPECIFIEDorcid.org/0000-0002-3496-4110UNSPECIFIED
URN: urn:nbn:de:hbz:38-321193
DOI: 10.1002/adom.202000414
Journal or Publication Title: Adv. Opt. Mater.
Volume: 8
Number: 17
Date: 2020
Publisher: WILEY-V C H VERLAG GMBH
Place of Publication: WEINHEIM
ISSN: 2195-1071
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
MOLECULAR-ORIENTATION; ELECTROLUMINESCENT; TRANSPORT; LUMINESCENCE; DEVICES; OLEDS; EXCIPLEX; ESTERS; FILMSMultiple languages
Materials Science, Multidisciplinary; OpticsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/32119

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