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Zhang, Zhen ; Kumar, Shiv ; Bagnich, Sergey ; Spuling, Eduard ; Hundemer, Fabian ; Nieger, Martin ; Hassan, Zahid ; Köhler, Anna ; Zysman-Colman, Eli ; Bräse, Stefan:
OBO-Fused Benzo[fg]tetracene as Acceptor With Potential for Thermally Activated Delayed Fluorescence Emitters.
In: Frontiers in Chemistry.
Bd. 8
(2020)
.
- 563411.
ISSN 2296-2646
DOI: https://doi.org/10.3389/fchem.2020.563411
Abstract
SixluminophoresbearinganOBO-fusedbenzo[fg]tetracenecoreasanelectronacceptor were designed and synthesized. The molecular structures of three molecules (PXZ-OBO, 5PXZ-OBO, 5DMAC-OBO) were determined by single crystal X-ray diffraction studies and revealed significant torsion between the donor moieties and the OBO acceptor with dihedral angles between 75.5 and 86.2◦. Photophysical studies demonstrate that blue and deep blue emission can be realized with photoluminescence maxima (λPL) ranging from 415 to 480nm in mCP films. The emission energy is modulated by simply varying the strength of the donor heterocycle, the number of donors, and their position relative to the acceptor. Although the DMAC derivatives show negligible delayed emission because of their large singlet-triplet excited state energy difference, 1EST, PXZ-based molecules, especially PXZ-OBO with an experimental 1EST of 0.25eV, demonstrate delayed emission in blend mCP films at room temperature, which suggests triplet exciton harvesting occurs in these samples, potentially by thermally activated delayed fluorescence.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | boron emitters; fluorescence; OLED; TADF; boron |
| Institutionen der Universität: | Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie - Univ.-Prof. Dr. Anna Köhler Fakultäten Fakultäten > Fakultät für Mathematik, Physik und Informatik |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Eingestellt am: | 06 Okt 2020 05:49 |
| Letzte Änderung: | 14 Jun 2023 11:06 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/57865 |