Organoelectroluminescent device using polycyclic aromatic compounds

An organic light-emitting device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• a hole injection layer or a hole transport layer and a light-emitting layer interposed between the first electrode and the second electrode,
• wherein
• (i) the hole injection layer or the hole transport layer comprises at least one compound represented by the following [Formula A], and
• (ii) the light-emitting layer comprises a compound represented by [Formula D]:
• wherein
• L is a single bond, a substituted or unsubstituted aromatic C6-C50 hydrocarbon ring, or a substituted or unsubstituted C2-C50 aromatic heterocyclic ring;
• n is an integer of 1 to 3, with the proviso that when n is 2 or more, L's are identical to or different from each other;
• Ar is selected from a substituted or unsubstituted C5-C50 aryl group and a substituted or unsubstituted C2-C50 heteroaryl group;
• Ra to Rc are identical to or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C6-C50 aryl group, a substituted or unsubstituted C3-C30 cycloalkyl group, a substituted or unsubstituted C2-C50 heteroaryl group, a substituted or unsubstituted C1-C30 alkoxy group, a substituted or unsubstituted C6-C30 aryloxy group, a substituted or unsubstituted C1-C30 alkylthioxy group, a substituted or unsubstituted C5-C30 arylthioxy group, a substituted or unsubstituted C1-C30 alkylamine group, a substituted or unsubstituted C5-C30 arylamine group, a substituted or unsubstituted C1-C30 alkylsilyl group, a substituted or unsubstituted C5-C30 arylsilyl group, a nitro group, a cyano group, and a halogen group, with the proviso that Rb and Rc are bonded to each other to further form an alicyclic or aromatic monocyclic or polycyclic ring,
• wherein
• Q1 to Q3 are identical to or different from each other, and are each independently a substituted or unsubstituted aromatic C6-C50 hydrocarbon ring, or a substituted or unsubstituted C2-C50 aromatic heterocyclic group,
• Y is selected from N—R1, CR2R3, O, S, Se, and SiR4R5, with the proviso that Y's are identical to or different from each other,
• X is selected from B, P and P═O,
• R1 to R5 are identical to or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C6-C50 aryl group, a substituted or unsubstituted C3-C30 cycloalkyl group, a substituted or unsubstituted C2-C50 heteroaryl group, a substituted or unsubstituted C1-C30 alkoxy group, a substituted or unsubstituted C6-C30 aryloxy group, a substituted or unsubstituted C1-C30 alkylthioxy group, a substituted or unsubstituted C5-C30 arylthioxy group, a substituted or unsubstituted C1-C30 alkylamine group, a substituted or unsubstituted C5-C30 arylamine group, a substituted or unsubstituted C1-C30 alkylsilyl group, a substituted or unsubstituted C5-C30 arylsilyl group, a nitro group, a cyano group, and a halogen group, with the proviso that each of R1 to R5 is bonded to the ring Q1 to Q3 to further form an alicyclic or aromatic monocyclic or polycyclic ring, and R2 and R3, and R4 and R5 are bonded to each other to further form an alicyclic or aromatic monocyclic or polycyclic ring,
• Cy1 is linked to an adjacent nitrogen (N) atom and an aromatic carbon atom in the adjacent Q1 ring to form a fused ring including a nitrogen (N) atom, an aromatic carbon atom in the Q1 ring to which the nitrogen (N) atom is bonded, and an aromatic carbon atom in the Q1 ring to which Cy1 is bonded, with the proviso that the fused ring formed by Cy1 is a substituted or unsubstituted C2-C5 alkylene group, provided that the nitrogen (N) atom, the aromatic carbon atom in the Q1 ring to which the nitrogen (N) atom is bonded, and the aromatic carbon atom in the Q1 ring to which Cy1 is bonded are excluded, and
• Cy3 is linked to a carbon atom bonded to a nitrogen atom in the adjacent Cy1, and an aromatic carbon atom in the Q3 ring to form a fused ring including the aromatic carbon atom in the Q3 ring to which Cy3 is bonded, the nitrogen (N) atom and the carbon atom in Cy1 bonded to the nitrogen (N) atom, with the proviso that the fused ring formed by Cy3 is a substituted or unsubstituted C1-C4 alkylene group, provided that the aromatic carbon atom in the Q3 ring to which Cy3 is bonded, the nitrogen (N) atom and the carbon atom in Cy1 bonded to the nitrogen (N) atom are excluded.