Organic electroluminescent element, and lighting device and display device which are provided with same

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 NR 9 ;

R 1 to R 8 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 R 1 to R 8 contains an aromatic heterocyclic group having 14 or more π electrons, and at least one of R 1 to R 8 is represented by Formula (2), provided that R 1 to R 8 may be further substituted with a substituent, and R 1 to R 8 may be the same or different; and

R 9 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, or P;

R represents an alkyl group, or an aromatic hydrocarbon ring group each having a total carbon atom number of 1 to 20, provided that R 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.

2. The organic electroluminescent element described in claim 1 , wherein L in Formula (2) represents the m-phenylene group.

3. The organic electroluminescent element described in claim 1 , wherein Z in Formula (2) represents Si.

4. The organic electroluminescent element described in claim 1 , wherein the compound represented by Formula (1) is a compound represented by Formula (3),

in Formula (3),

R, n, m and X each are synonymous with R, n, m and X in Formula (1) or Formula (2);

R 10 , R 11 and R 12 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, or a non-aromatic heterocyclic group, provided that R 10 , R 11 , and R 12 may be further substituted with a substituent, R 10 , R 11 , and R 12 may be the same or different, and at least one of R 10 and R 11 is an aromatic heterocyclic group having 14 or more π electrons.

5. The organic electroluminescent element described in claim 1 , wherein the compound having a structure represented by Formula (1) is a compound represented by Formula (4) or Formula (5),

in Formula (4) and Formula (5),

R, n, m and X each are synonymous with R, n, m and X in Formula (1) or Formula (2);

R 10 to R 14 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, or a non-aromatic heterocyclic group, provided that R 10 to R 14 may be further substituted with a substituent, and R 10 to R 14 may be the same or different;

R 15 represent: 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; and

L 1 and L 2 each represent a single bond or a divalent linking group.

6. The organic electroluminescent element described in claim 1 , wherein the compound having a structure represented by Formula (1) is a compound represented by Formula (6),

in Formula (6),

R, n, m and X each are synonymous with R, n, m and X in Formula (1) or Formula (2);

R 10 to R 14 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, or a non-aromatic heterocyclic group, provided that R 10 to R 14 may be further substituted with a substituent, and R 10 to R 14 may be the same or different.

7. The organic electroluminescent element described in claim 1 , wherein one of the organic layers is a light emitting layer, and the light emitting layer contains the aforesaid compound as a host compound for organic electroluminescence.

8. The organic electroluminescent element described in claim 7 , wherein the aforesaid light emitting layer contains an iridium complex or a platinum complex, and the complex emits phosphorescence by applying current.

9. The organic electroluminescent element described in claim 1 , emitting white light.

10. A lighting device provided with the organic electroluminescent element described in claim 1 .

11. A display device provided with the organic electroluminescent element described in claim 1 .