Patent ID: 8546793

Claim:
A heterocyclic compound represented by Formula 1 below: wherein R 1 through R 5 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 3 -C 60 cycloalkyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 5 -C 60 aryloxy group, a substituted or unsubstituted C 5 -C 60 arylthio group, a substituted or unsubstituted C 5 -C 60 aryl group, an amino group substituted with a C 5 -C 60 aryl or C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 6 -C 60 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, or a carboxyl group; Ar 1 and Ar 2 are each independently a substituted or unsubstituted C 3 -C 50 cycloalkyl group, a substituted or unsubstituted C 5 -C 60 aryloxy group, a substituted or unsubstituted C 5 -C 60 arythio group, a substituted or unsubstituted C 5 -C 60 aryl group, an amino group substituted with a C 5 -C 60 aryl or C 3 -C 60 heteroaryl group, a substituted or unsubstituted C 3 -C 60 heteroaryl group, or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group; and X is a divalent linking group represented by —(Ar 3 ) n — wherein Ar 3 is a substituted or unsubstituted C 5 -C 60 arylene group, a substituted or unsubstituted C 3 -C 60 heteroarylene group, or a substituted or unsubstituted C 6 -C 60 condensed polycyclic group, and n is an integer from 1 to 10, wherein n groups of Ar 3 are identical to or different from each other, and wherein when n is greater than 1, at least two adjacent groups of the n Ar 3 groups are fused or linked to each other by a single bond.