A compound of any one of the following Formulae 4, 6, 7, 8, 9, and 10:
- wherein in Formula 4, 6, 7, 8, 9, and 10:
- Y is NR, CRxRy, O, or S;
- R, Rx, and Ry are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, or are bonded to an adjacent group to form a substituted or unsubstituted ring;
- Y1 is CRz or N;
- Y2 is NR20, CR21R22, O, or S;
- Y3 is CR16R17, NR19, O, or S;
- Rz, R16, R17, and R19 are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, or are bonded to an adjacent group to form a substituted or unsubstituted ring;
- R20 to R22 are the same as or different from each other, and are each independently hydrogen, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or are bonded to an adjacent group to form a substituted or unsubstituted ring;
- A1 and A2 are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, or are bonded to each other to form a substituted or unsubstituted ring;
- R1 to R3 are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, or are bonded to an adjacent group to form a substituted or unsubstituted ring;
- R3 is optionally bonded to Y to form a substituted or unsubstituted ring;
- R18 is hydrogen, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or bonded to an adjacent group to form a substituted or unsubstituted ring;
- R23 to R25 are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, or a substituted or unsubstituted heteroaryl group;
- a and b are each an integer from 0 to 3;
- c is an integer from 0 to 4;
- c′ is an integer from 0 to 3;
- b′, d′, e, and f are each an integer from 0 to 4;
- when a is 2 or higher, two or more R1s are the same as or different from each other;
- when b is 2 or higher, two or more R2s are the same as or different from each other;
- when b′ is 2 or higher, two or more R23s are the same as or different from each other;
- when c is 2 or higher, two or more R3s are the same as or different from each other;
- when c′ is 2 or higher, two or more R3s are the same as or different from each other;
- when d′ is 2 or higher, two or more R18s are the same as or different from each other;
- when e is 2 or higher, two or more R24s are the same as or different from each other;
- and
- when f is 2 or higher, two or more R25s are the same as or different from each other.