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A series of CBP-derivatives as host materials for blue phosphorescent organic light-emitting diodes

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00004765
URN to cite this document: urn:nbn:de:bvb:703-epub-4765-9

Title data

Schrögel, Pamela ; Tomkevičienė, Aušra ; Strohriegl, Peter ; Hoffmann, Sebastian T. ; Köhler, Anna ; Lennartz, Christian:
A series of CBP-derivatives as host materials for blue phosphorescent organic light-emitting diodes.
In: Journal of Materials Chemistry. Vol. 21 (2011) Issue 7 . - pp. 2266-2273.
ISSN 0959-9428
DOI der Verlagsversion: https://doi.org/10.1039/c0jm03321a

Project information

Project title:
Project's official titleProject's id
TOPAS 201213N 10447

Project financing: Bundesministerium für Bildung und Forschung

Abstract

We report a series of CBP-derivatives with superior thermal and electronic properties for the use as host materials for blue electrophosphorescent organic light emitting diodes. We applied a systematic variation of the substitution pattern in the 2- and 2′-position of the biphenyl unit and the 3- and 6-position of the carbazole moieties. In contrast to the crystalline parent compound CBP, all methyl and trifluoromethyl substituted derivatives show amorphous behaviour. Substitution in the 2- and 2′-position of the biphenyl causes a twisting of the phenyl rings. Hence, the degree of conjugation of the molecules is limited which leads to enlarged triplet energies of approximately 2.95 eV compared to 2.58 eV for CBP. The methyl substitution at the active 3- and 6-position of the pendant carbazole units yields materials with an electrochemically stable behaviour against oxidation.

Further data

Item Type: Article in a journal
Additional notes (visible to public): ISI:000286834600036
DDC Subjects: 500 Science > 530 Physics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter > Chair Experimental Physics II - Optoelectronics of Soft Matter - Univ.-Prof. Dr. Anna Köhler
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-4765-9
Date Deposited: 03 Sep 2020 10:13
Last Modified: 03 Sep 2020 10:14
URI: https://epub.uni-bayreuth.de/id/eprint/4765

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