Patent ID: 8685542

Claim:
An organic light-emitting device, comprising: a substrate; a first electrode on the substrate, the first electrode including a first surface and a second surface opposite to the first surface; an organic layer on the first electrode, the organic layer being adjacent to the first surface of the first electrode; a second electrode on the organic layer, the second electrode including a first surface adjacent to the organic layer and a second surface opposite to the first surface; and a luminescent efficiency improvement layer on at least one of the second surface of the first electrode and the second surface of the second electrode, the luminescent efficiency improvement layer including a condensed-cyclic compound represented by Formula 1, below: wherein, in Formula 1, ring A is represented by Formula 2 or 3 below: wherein, in Formulae 1 to 3, R 1 through R 12 are each independently a hydrogen atom, a heavy hydrogen, a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted C 1 -C 30 alkyl group, a substituted or unsubstituted C 2 -C 30 alkenyl group, a substituted or unsubstituted C 2 -C 30 alkynyl group, a substituted or unsubstituted C 1 -C 30 alkoxy group, a first substituent represented by â€”(Ar 1 ) a â€”Ar 11 , a second substituent represented by â€”N[â€”(Ar 2 ) b â€”Ar 12 ][â€”(Ar 3 ) c â€”Ar 13 ], or a third substituent represented by â€”(Ar 4 ) d â€”N[â€”(Ar 5 ) e â€”Ar 15 ][â€”(Ar 6 ) f â€”Ar 16 ]; Ar 1 through Ar 6 , among the first to third substituents, are each independently a substituted or unsubstituted C 1 -C 30 alkylene group, a substituted or unsubstituted C 2 -C 30 alkenylene group, a substituted or unsubstituted C 5 -C 30 arylene group, or a substituted or unsubstituted C 3 -C 30 heteroarylene group; Ar 11 , Ar 12 , Ar 13 , Ar 15 , and Ar 16 , among the first to third substituents, are each independently a hydrogen atom, a heavy hydrogen, a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted C 1 -C 30 alkyl group, a substituted or unsubstituted C 2 -C 30 alkenyl group, a substituted or unsubstituted C 2 -C 30 alkynyl group, a substituted or unsubstituted C 1 -C 30 alkoxy group, a substituted or unsubstituted C 5 -C 30 aryl group, or a substituted or unsubstituted C 3 -C 30 heteroaryl group; a, b, c, e, and f are each independently an integer from 0 to 10; d is an integer from 1 to 10; and a groups of Ar 1 in the group of â€”(Ar 1 ) a â€”Ar 11 are identical to or different from each other; b groups of Ar 2 in the group of â€”(Ar 2 ) b â€”Ar 12 are identical to or different from each other; c groups of Ar 3 in the group of â€”(Ar 3 ) c â€”Ar 13 are identical to or different from each other; e groups of Ar 5 in the group of â€”(Ar 5 ) e â€”Ar 15 are identical to or different from each other; and f groups of Ar 6 in the group of â€”(Ar 6 ) f â€”Ar 16 are identical to or different from each other.