Room‐temperature multiple phosphorescence from functionalized corannulenes: temperature sensing and afterglow organic light‐emitting diode**

Abstract: Corannulene-derived materials have been extensively explored in energy storage and solar cells, however, are rarely documented as emitters in light-emitting sensors and organic light-emitting diodes (OLEDs), due to low exciton utilization. Here, we report a family of multi-donor and acceptor (multi-D-A) motifs, TCzPhCor, TDMACPhCor, and TPXZPhCor, using corannulene as the acceptor and carbazole (Cz), 9,10-dihydro-9,10-dimethylacridine (DMAC), and phenoxazine (PXZ) as the donor, respectively. By decorating corannulene with different donors, multiple phosphorescence is realized. Theoretical and photophysical investigations reveal that TCzPhCor shows room-temperature phosphorescence (RTP) from the lowest-lying T1; however, for TDMACPhCor, dual RTP originating from a higher-lying T1 (T1H) and a lower-lying T1 (T1L) can be observed, while for TPXZPhCor, T1H-dominated RTP occurs resulting from a stabilized high-energy T1 geometry. Benefiting from the high-temperature sensitivity of TPXZPhCor, high color-resolution temperature sensing is achieved. Besides, due to degenerate S1 and T1H states of TPXZPhCor, the first corannulene-based solution-processed afterglow OLEDs is investigated. The afterglow OLED with TPXZPhCor shows a maximum external quantum efficiency (EQEmax) and a luminance (Lmax) of 3.3 % and 5167 cd m−2, respectively, which is one of the most efficient afterglow RTP OLEDs reported to date

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• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch
• Anmerkungen: Angewandte Chemie. - 62, 43 (2023) , e202309718, ISSN: 1521-3773

Beteiligte, Orts- und Zeitangaben

• Ereignis: Veröffentlichung
• (wo): Freiburg
• (wer): Universität
• (wann): 2024
• Urheber: Si, Changfeng ; Wang, Tao ; Gupta, Abhishek Kumar ; Cordes, David B. ; Slawin, Alexandra M. Z. ; Siegel, Jay S. ; Zysman-Colman, Eli

Weitere Informationen

• DOI: 10.1002/anie.202309718
• URN: urn:nbn:de:bsz:25-freidok-2542849
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.