Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 27, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202202232
Keywords
Nitrogen Doping; Organic Light-Emitting Diodes; Polycyclic Aromatic Hydrocarbons; Room-Temperature Phosphorescence; Thermally Activated Delayed Fluorescence
Categories
Funding
- National Science Centre, Poland [UMO-2018/31/D/ST5/00426, 2020/39/B/ST4/01952]
- Polish Ministry of Education and Science
- European Union [847413]
- Minister of Science and Higher Education [5005/H2020-MSCA-COFUND/2019/2]
- Polish National Science Centre [2017/25/B/ST5/02488]
- Rector of the Silesian University of Technology [04_040_SDU_10-22-04, 04/040/RGJ21/0149]
- EU [952008]
Ask authors/readers for more resources
In this study, the synthesis and characterization of curved and fully conjugated nitrogen-doped PAHs were reported. By modifying the structure of the electron-accepting moiety, the luminescence mechanism was switched between TADF and RTP, and the overall PLQY was tuned in the range of 9% to 86%. Solid-state OLED devices were constructed, achieving a high external quantum efficiency.
Although bowl-shaped N-pyrrolic polycyclic aromatic hydrocarbons (PAHs) can achieve excellent electron-donating ability, their application for optoelectronics is hampered by typically low photoluminescence quantum yields (PLQYs). To address this issue, we report the synthesis and characterization of a series of curved and fully conjugated nitrogen-doped PAHs. Through structural modifications to the electron-accepting moiety, we are able to switch the mechanism of luminescence between thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP), and to tune the overall PLQY in the range from 9 % to 86 %. As a proof of concept, we constructed solid-state organic light-emitting diode (OLED) devices, which has not been explored to date in the context of concave N-doped systems being TADF/RTP emitters. The best-performing dye, possessing a peripheral trifluoromethyl group adjacent to the phenazine acceptor, exhibits yellow to orange emission with a maximum external quantum efficiency (EQE) of 12 %, which is the highest EQE in a curved D-A embedded N-PAH to date.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available