申请人:Toray Industries, Inc.
公开号:US20210151683A1
公开(公告)日:2021-05-20
An object of the present invention is to provide an organic thin-film light-emitting element which achieves both a high luminous efficiency and light emission having high color purity. The present invention is a light-emitting element including: an anode; a cathode; and a plurality of organic layers including an emissive layer between the anode and the cathode, and emitting light by means of electrical energy. The emissive layer contains a compound represented by general formula (1) and a delayed fluorescent compound:
wherein X represents C—R
7
or N; R
1
to R
9
are the same or different from each other, and each are selected from a hydrogen atom, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, a halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an ester group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group, —P(═0)R
10
R
11
, and a fused ring and an aliphatic ring formed with an adjacent substituent; and R
10
and R
11
each are an aryl group or a heteroaryl group.