TADF MATERIALS COMPRISING 4-(3-(2-(10H-PHENOXAZIN-10-YL)PYRIDIN-5-YL)-9H-CARBAZOL-9-YL)BENZONITRILE DERIVATIVES AND RELATED COMPOUNDS FOR USE IN OLEDS

摘要

A thermally activated delayed fluorescence (TADF) material comprising a compound of Formula I:wherein at least one of the substituents R1 and R2 is represented by Formula II:wherein:;Y is independently selected from carbon and nitrogen atom,;NRa is an amine group independently selected from an aromatic amine;and a heterocyclic amine, wherein N is a trivalent nitrogen atom, and/or;a substituent R3 is represented by Formula III:wherein:;Y is a carbon or a nitrogen atom,;Z is selected from the group consisting of hydrogen and an acceptor moiety.;An exemplary compound is e.g. 4-(3-(2-(10H-phenoxazin-10-yl)pyridin-5-yl)-9H-carbazol-9-yl)benzonitrile (embodiment 2):