Highly Emissive 9-Borafluorene Derivatives: Synthesis, Photophysical Properties and Device Fabrication
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- A series of 9-borafluorene derivatives, functionalised with electron-donating groups, have been prepared. Some of these 9-borafluorene compounds exhibit strong yellowish emission in solution and in the solid state with relatively high quantum yields (up to 73.6 % for FMesB-Cz as a neat film). The results suggest that the highly twisted donor groups suppress charge transfer, but the intrinsic photophysical properties of the 9-borafluorene systems remain. The new compounds showed enhanced stability towards the atmosphere, and exhibited excellentA series of 9-borafluorene derivatives, functionalised with electron-donating groups, have been prepared. Some of these 9-borafluorene compounds exhibit strong yellowish emission in solution and in the solid state with relatively high quantum yields (up to 73.6 % for FMesB-Cz as a neat film). The results suggest that the highly twisted donor groups suppress charge transfer, but the intrinsic photophysical properties of the 9-borafluorene systems remain. The new compounds showed enhanced stability towards the atmosphere, and exhibited excellent thermal stability, revealing their potential for application in materials science. Organic light-emitting diode (OLED) devices were fabricated with two of the highly emissive compounds, and they exhibited strong yellow-greenish electroluminescence, with a maximum luminance intensity of >22 000 cd m\(^{-2}\). These are the first two examples of 9-borafluorene derivatives being used as light-emitting materials in OLED devices, and they have enabled us to achieve a balance between maintaining their intrinsic properties while improving their stability.…
Autor(en): | Xing Chen, Guoyun Meng, Guanming Liao, Florian Rauch, Jiang He, Alexandra Friedrich, Todd B. MarderORCiD, Nan Wang, Pangkuan Chen, Suning Wang, Xiaodong Yin |
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URN: | urn:nbn:de:bvb:20-opus-256738 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Chemie und Pharmazie / Institut für Anorganische Chemie |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Chemistry—A European Journal |
Erscheinungsjahr: | 2021 |
Band / Jahrgang: | 27 |
Heft / Ausgabe: | 20 |
Seitenangabe: | 6274–6282 |
Originalveröffentlichung / Quelle: | Chemistry—A European Journal 2021, 27(20):6274–6282. DOI: 10.1002/chem.202005185 |
DOI: | https://doi.org/10.1002/chem.202005185 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 546 Anorganische Chemie |
Freie Schlagwort(e): | boron heterocycles; density functional calculations; luminescence; organic light-emitting diodes; photophysics |
Datum der Freischaltung: | 07.03.2022 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |