主权项 |
1. An organic electroluminescent element comprising a pair of electrodes having therebetween one or a plurality of organic layers,
wherein one or more of the organic layers contain a compound having a structure represented by Formula (1), in Formula (1), X represents O, S or NR9; R1 to R8 each represent: a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, a carbonyl group, an amino group, a silyl group, a phosphine oxide group, an aromatic hydrocarbon ring group, an aromatic heterocyclic group, a non-aromatic hydrocarbon ring group, a non-aromatic heterocyclic group, or a substituent represented by Formula (2); at least one of R1 to R8 contains an aromatic heterocyclic group having 14 or more n electrons, and at least one of R1 to R8 is represented by Formula (2), provided that these groups may be further substituted with a substituent, and these groups may be the same or different; and R9 represents: a hydrogen atom, a deuterium atom, an alkyl group, an alkenyl group, an alkynyl group, an arylalkyl group, an aromatic hydrocarbon ring group, an aromatic heterocyclic group, a non-aromatic hydrocarbon ring group, or a non-aromatic heterocyclic group,
-(L)n-Z—(R)m Formula (2) in Formula (2), L represents a linking group selected from the group consisting of an alkylene group, an alkenylene group, a m-phenylene group and a single ring aromatic heterocyclic group, the linking group may be substituted with a substituent; Z represents C, Si, Ge, P or P═O; R represents an alkyl group, an aromatic hydrocarbon ring group or an aromatic heterocyclic group each having a total carbon atom number of 1 to 20, provided that these groups may be further substituted with a substituent; “n” represents an integer of 2 to 8; “m” represents an integer of 2 to 3; when the compound contains a plurality of groups represented by Formula (2), a plurality of Ls, Zs an Rs each may be the same or different with each other, provided that adjacent Ls and adjacent Rs are not joined to form a ring. |