ORGANIC ELECTROLUMINESCENT ELEMENT, COMPOUND, MATERIAL FOR ORGANIC ELECTROLUMINESCENT ELEMENT, AND ELECTRONIC DEVICE
申请人:Idemitsu Kosan Co., Ltd.
公开号:EP3896070A1
公开(公告)日:2021-10-20
An organic EL device includes an anode, a cathode, and an emitting layer interposed between the anode and the cathode, in which the emitting layer includes a delayed fluorescent compound M2 and a compound M3 represented by a formula (100), and a singlet energy S1(M2) of the compound M2 and a singlet energy S1(M3) of the compound M3 satisfy a numerical formula (Numerical Formula 1). In the formula (100), X1 is an oxygen atom or a sulfur atom, C1 is a carbon atom, R11 to R18, R2, R31, R32, R34, R35, R4 and R45 to R48 are each independently a hydrogen atom, substituent or the like, n is 1, 2, or 3. When L1 is a single bond, n is 1, k is 1, 2, or 3, m is 2, 3, or 4, k+m=5, and L1 is a single bond or linking group. S1M3>S1M2
一种有机电致发光器件包括阳极、阴极和置于阳极与阴极之间的发光层,其中发光层包括延迟荧光化合物M2和由式(100)表示的化合物M3,化合物M2的单线能量S1(M2)和化合物M3的单线能量S1(M3)满足一个数字式(数字式1)。在式 (100) 中,X1 是氧原子或硫原子,C1 是碳原子,R11 至 R18、R2、R31、R32、R34、R35、R4 和 R45 至 R48 各自独立地是氢原子、取代基或类似物,n 是 1、2 或 3。当 L1 为单键时,n 为 1,k 为 1、2 或 3,m 为 2、3 或 4,k+m=5,L1 为单键或连接基团。S1M3>S1M2