ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
申请人:IDEMITSU KOSAN CO.,LTD.
公开号:US20210020846A1
公开(公告)日:2021-01-21
An organic electroluminescence device includes an anode, a first organic layer, and a cathode in this order. The first organic layer contains a first compound, a second compound, and a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded to Y, Y being a hydrogen atom or a substituent. In the formula (3), n is 1 to 4, X
B
is a group represented by a formula (3A). In the formula (3A), Ar
1
and Ar
2
are each independently a monovalent or polyvalent aromatic hydrocarbon group, and Cz is a group represented by a formula (3B-1) and the like.
Buu-Hoi et al., Journal of the Chemical Society, 1957, p. 3126,3128