Patent ID: 8920946

Claim:
A compound represented by Formula 1: wherein: A 1 to A 3 are each independently N or C(R 20 ); X is N; Y is O or S; B is N or C(R 21 ); Ar is a substituted or unsubstituted C 6 -C 60 aryl group or a substituted or unsubstituted C 3 -C 30 heteroaryl group; R 1 to R 15 , R 20 , and R 21 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group, and R 15 and R 21 optionally combine to form a ring; and is a moiety represented by one of the following formulae, wherein * indicates a binding site: