Organic electroluminescent device
View Patent ↗An organic electroluminescent device comprises: a pair of electrodes; and at least one organic compound layer therebetween, the at least one organic compound layer comprises at least a light-emitting layer, wherein at least one of the at least one organic compound layer comprises at least one compound represented by formula (1): Formula (1): wherein Q 1 to Q 4 each independently represents an atomic group for forming an aromatic hydrocarbon ring or an aromatic heterocyclic ring in combination with two carbon atoms in formula (1); A 1 and A 2 each independently represents a carbon atom or a nitrogen atom; and Q 5 and Q 6 each independently represents an atomic group for forming an aromatic hydrocarbon ring or an aromatic heterocyclic ring in combination with A 1 and A 2 respectively, provided that Q 5 and Q 6 are not combined through a single bond, a divalent aromatic hydrocarbon ring group or a divalent aromatic heterocyclic ring group.
1. An organic electroluminescent device, which comprises:
a pair of electrodes; and
at least one organic compound layer between the pair of electrodes, the at least one organic compound layer comprises at least a light-emitting layer,
wherein at least one of the at least one organic compound layer comprises at least one compound represented by formula (1):
Formula (1):
wherein A 1 and A 2 each independently represents a carbon atom or a nitrogen atom;
Q 5 and Q 6 each independently represents an atomic group for forming an aromatic hydrocarbon ring or an aromatic heterocyclic ring in combination with A 1 and A 2 respectively, provided that Q 5 and Q 6 are not combined through a single bond, a divalent aromatic hydrocarbon ring group or a divalent aromatic heterocyclic ring group;
A 31 to A 38 each independently represents N or C—R 31 to C—R 38 ;
R 31 to R 38 each independently represents a hydrogen atom or a substituent; and
R 1 to R 8 each independently represents a hydrogen atom or a substituent,
wherein the at least one compound represented by formula (1) has a glass transition temperature of 130 to 450° C., and has the lowest excited triplet energy level of from 63 kcal/mol to 95 kcal/mol.
2. The organic electroluminescent device according to claim 1 ,
wherein the light-emitting layer comprises a light-emitting material, and
wherein the light-emitting material comprises at least a phosphorescent material.
3. The organic electroluminescent device according to claim 2 ,
wherein the phosphorescent material is an iridium complex or a platinum complex.
4. The organic electroluminescent device according to claim 2 ,
wherein the phosphorescent material is a platinum complex of a tetradentate ligand.
5. The organic electroluminescent device according to claim 2 ,
wherein the phosphorescent material is an iridium complex having a fluorine-substituted phenyl group in a ligand.
6. The organic electroluminescent device according to claim 1 ,
wherein the light-emitting layer comprises the at least one compound represented by formula (1).
7. The organic electroluminescent device according to claim 1 ,
wherein the at least one compound represented by formula (1) is represented by formula (2):
wherein Q 41 and Q 42 each independently represents an atomic group for forming an aromatic hydrocarbon ring or an aromatic heterocyclic ring in combination with the carbon atom in formula (4), provided that Q 41 and Q 42 are not combined through a single bond, a divalent aromatic hydrocarbon ring group or a divalent aromatic heterocyclic ring group;
A 31 to A 38 each independently represents N or C—R 31 to C—R 38 ;
R 31 to R 38 each independently represents a hydrogen atom or a substituent; and
R 1 to R 8 each independently represents a hydrogen atom or a substituent.
8. The organic electroluminescent device according to claim 1 ,
wherein the at least one compound represented by formula (1) is represented by formula (3):
wherein A 31 to A 38 and A 501 to A 510 ) each independently represents N or C—R 31 to C—R 38 and C—R 501 to C—R 510 ;
R 31 to R 38 and R 501 to R 510 each independently represents a hydrogen atom or a substituent; and
R 1 to R 8 each independently represents a hydrogen atom or a substituent.