Highly Emissive 9-Borafluorene Derivatives: Synthesis, Photophysical Properties and Device Fabrication
Please always quote using this URN: urn:nbn:de:bvb:20-opus-256738
- 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.…
Author: | 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 |
Document Type: | Journal article |
Faculties: | Fakultät für Chemie und Pharmazie / Institut für Anorganische Chemie |
Language: | English |
Parent Title (English): | Chemistry—A European Journal |
Year of Completion: | 2021 |
Volume: | 27 |
Issue: | 20 |
Pagenumber: | 6274–6282 |
Source: | Chemistry—A European Journal 2021, 27(20):6274–6282. DOI: 10.1002/chem.202005185 |
DOI: | https://doi.org/10.1002/chem.202005185 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 546 Anorganische Chemie |
Tag: | boron heterocycles; density functional calculations; luminescence; organic light-emitting diodes; photophysics |
Release Date: | 2022/03/07 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |