Organic electroluminescent device
View Patent ↗An organic electroluminescent device is provided and includes: a cathode; an anode; and at least one organic layer between the cathode and the anode. The at least one organic layer includes a light emitting layer containing at least one light emitting material. A compound represented by the following formula (I) is contained in the at least one organic layer. where n stands for an integer of 2 or greater, L represents an n-valent linking group, and R 1 , R 2 , R 3 , and R 4 each independently represents a hydrogen atom or a substituent.
1. An organic electroluminescent device comprising:
a cathode;
an anode; and
at least one organic layer between the cathode and the anode, the at least one organic layer including a light emitting layer containing at least one light emitting material,
the device comprising, in the at least one organic layer, a compound represented by formula (I):
wherein n stands for an integer of 2 or 3 , L represents an n-valent linking group, and R 1 , R 2 , R 3 , and R 4 each independently represents a hydrogen atom or a substituent.
2. The organic electroluminescent device according to claim 1 , wherein the compound represented by formula (I) is a compound represented by formula (II):
wherein n stands for an integer of 2 or 3 , L represents an n-valent linking group, R 1 and R 2 each independently represents a hydrogen atom or a substituent, and Q represents a benzene ring or an aromatic heterocycle.
3. The organic electroluminescent device according to claim 2 , wherein the compound represented by formula (II) is a compound represented by formula (III):
wherein n stands for an integer of 2 or 3 , L represents an n-valent linking group, and R 1 , R 2 , R 31 , R 32 , R 33 , and R 34 each independently represents a hydrogen atom or a substituent.
4. The organic electroluminescent device according to claim 1 , wherein L in formula (I) represents a linking group including a benzene ring.
5. The organic electroluminescent device according to claim 3 , wherein the compound represented by formula (III) is a compound represented by formula (IV):
wherein R 401 to R 416 each independently represents a hydrogen atom or a substituent.
6. The organic electroluminescent device according to claim 1 , wherein the compound represented by formula (I) is contained in the light emitting layer.
7. The organic electroluminescent device according to claim 1 , wherein the light emitting material includes a phosphorescent material.
8. The organic electroluminescent device according to claim 7 , wherein the phosphorescent material is a platinum complex or an iridium complex.
9. The organic electroluminescent device according to claim 8 , wherein the platinum complex has a tridentate ligand or a tetradentate ligand.
10. The organic electroluminescent device according to claim 9 , wherein the platinum complex is represented by formula (C-1):
wherein Q 1 , Q 2 , Q 3 , and Q 4 each independently represents a ligand coordinated to Pt, and L 1 , L 2 , and L 3 each independently represents a single bond or a divalent linking group.
11. A compound represented by formula (IV):
wherein R 401 to R 416 each independently represents a hydrogen atom or a substituent.