Difluorodithieno[3,2-a:2′,3′-c]phenazine as a strong acceptor for materials displaying thermally activated delayed fluorescence or room temperature phosphorescence

Tom Cardeynaels, Simon Paredis, Andrew Danos, Alastair Harrison, Jasper Deckers, Sonny Brebels, Laurence Lutsen, Dirk Vanderzande, Andrew P. Monkman, Benoît Champagne, Wouter Maes

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Abstract

A novel strong electron-acceptor unit, 9,10-difluorodithieno[3,2-a:2′,3′-c]phenazine (DTPz), is synthesized and applied in the design of two donor-acceptor type emitters displaying long-lived delayed emission. Using either 9,9-dimethyl-9,10-dihydroacridine (DMAC) or triisopropyl-substituted benzo[1,2-b:4,5-b']dithiophene (BDT-TIPS) as the donor component, push-pull type chromophores exhibiting charge-transfer emission are obtained and found to afford either thermally activated delayed fluorescence (TADF) for DMAC or room temperature phosphorescence (RTP) for BDT-TIPS.
Original languageEnglish
Article number109301
JournalDyes and pigments
Volume190
DOIs
Publication statusE-pub ahead of print - 23 Mar 2021

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