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):
一种热激活延迟荧光(TADF)材料,由式 I 的化合物组成:
其中至少一个取代基 R1 和 R2 由式 II 表示:
其中
Y 独立地选自碳原子和氮原子、
NRa 是独立选自芳香胺和杂环胺的胺基团,其中 N 是含氮原子
和杂环胺,其中 N 是三价氮原子,和/或
取代基 R3 由式 III 表示:
其中
Y 是碳原子或氮原子、
Z 选自氢和受体分子组成的组。
一个示例化合物是例如 4-(3-(2-(10H-苯并
恶嗪-10-基)
吡啶-5-基)-
9H-咔唑-9-基)苯腈(实施例 2):