申请人:NIPPON STEEL Chemical & Material Co., Ltd.
公开号:EP4084107A1
公开(公告)日:2022-11-02
To provide an organic electroluminescent device realizing high efficiency and low voltage characteristics. A light-emitting layer including compounds of (1) and (2) and a dopant is included. X represents N or CR3, wherein at least one X represents N. R1 represents (1b), R2 represents (1c), and R3 represents an alkyl group or the like. Y represents O, S, NR4, or CR5R6, R4 to R6 each represent an alkyl group or the like, and one of R7 to R14 binds to a ring in (1). * represents a binding position to a ring in (1), and rings C and D are each an aromatic ring fused to an adjacent ring. R15, R16 and R17 have the same meaning as R3 (a and b represent the number of substitutions) . R19 has the same meaning as R4, and R20 to R27 each represent CR3, CR28 or N and at least one thereof represents CR28, and R28 represents formula (2b). Z represents O, S, NR37, or CR38R39, R37 to R39 each has the same meaning as R4, and one of R29 to R36 binds to a ring in (2) and the others represent CR3 or N.
提供一种具有高效率和低电压特性的有机电致发光器件。发光层包括(1)和(2)的化合物以及一种掺杂剂。X 代表 N 或 CR3,其中至少一个 X 代表 N。R1 代表(1b),R2 代表(1c),R3 代表烷基或类似基团。Y 代表 O、S、NR4 或 CR5R6,其中 R4 至 R6 各代表一个烷基或类似物,R7 至 R14 中的一个与(1)中的一个环结合。* 代表与(1)中一个环的结合位置,环 C 和环 D 分别是与相邻环融合的芳香环。R15、R16 和 R17 的含义与 R3 相同(a 和 b 代表取代数)。R19 的含义与 R4 相同,R20 至 R27 各自代表 CR3、CR28 或 N,其中至少一个代表 CR28,R28 代表式 (2b)。Z代表O、S、NR37或CR38R39,R37至R39各自的含义与R4相同,R29至R36中的一个与式(2)中的环结合,其它代表CR3或N。