A compound represented by Chemical Formula 1: wherein, in Chemical Formula 1, X 1 is one of S, Se, Te, O, S(=O), S(=O) 2, NR a1, SiR b1 R c1, or GeR d1 R e1 (wherein R a1, R b1, R c1, R d1, and R e1 are independently one of hydrogen, a substituted C1 to C10 alkyl group, or an unsubstituted C1 to C10 alkyl group), Ar is an aromatic ring group including N and X 2 (wherein X 2 is one of S, Se, Te, O, S(=O), S(=O) 2, N, NR a2, CR b2, CR c2 R d2, SiR e2 R f2, or GeR g2 R h2, and R a2, R b2, R c2, R d2, R e2, R f2, R g2, and R h2 are independently one of hydrogen, a substituted C1 to C10 alkyl group, or an unsubstituted C1 to C10 alkyl group), R 1 to R 3 are independently one of hydrogen, deuterium, a substituted C1 to C30 alkyl group, an unsubstituted C1 to C30 alkyl group, a substituted C1 to C30 alkoxy group, an unsubstituted C1 to C30 alkoxy group, a substituted C6 to C30 aryl group, an unsubstituted C6 to C30 aryl group, a substituted C3 to C30 heteroaryl group, an unsubstituted C3 to C30 heteroaryl group, a substituted C2 to C30 acyl group, an unsubstituted C2 to C30 acyl group, a halogen, a cyano group (-CN), a cyano-containing group, a nitro group, -SiR a R b R c (wherein R a, R b, and R c are independently one of hydrogen, a substituted C1 to C10 alkyl group, or an unsubstituted C1 to C10 alkyl group), or a combination thereof, and Y is a functional group represented by Chemical Formula 2A or Chemical Formula 2B, wherein, in Chemical Formula 2A, Ar 1 and Ar 2 are independently one of a substituted C6 to C30 aryl group, an unsubstituted C6 to C30 aryl group, a substituted C3 to C30 heteroaryl group, or an unsubstituted C3 to C30 heteroaryl group, wherein, in Chemical Formula 2B, Ar 3 and Ar 4 are independently one of a substituted C6 to C30 arylene group, an unsubstituted C6 to C30 arylene group, a substituted C3 to C30 heteroarylene group, or an unsubstituted C3 to C30 heteroarylene group, and G is one of a single bond, S, Se, Te, O, NR a3, (CR b3 R c3) n, (C(R d3)=C(R e3)), SiR f3 R g3, or GeR h3 R i3 (wherein R a3, R b3, R c3, R d3, R e3, R f3, R g3, R h3, and R i3 are independently one of hydrogen, a halogen, a substituted C1 to C10 alkyl group, an unsubstituted C1 to C10 alkyl group, a substituted C6 to C10 aryl group, or an unsubstituted C6 to C10 aryl group, and optionally R d3 and R e3 are independently present or are linked with each other to provide a fused ring, and n is an integer of 1 or 2). X 1 is one of S, Se, Te, O, S(=O), S(=O) 2, NR a1, SiR b1 R c1, or GeR d1 R e1 (wherein R a1, R b1, R c1, R d1, and R e1 are independently one of hydrogen, a substituted C1 to C10 alkyl group, or an unsubstituted C1 to C10 alkyl group), Ar is an aromatic ring group including N and X 2 (wherein X 2 is one of S, Se, Te, O, S(=O), S(=O) 2, N, NR a2, CR b2, CR c2 R d2, SiR e2 R f2, or GeR g2 R h2, and R a2, R b2, R c2, R d2, R e2, R f2, R g2, and R h2 are independently one of hydrogen, a substituted C1 to C10 alkyl group, or an unsubstituted C1 to C10 alkyl group), R 1 to R 3 are independently one of hydrogen, deuterium, a substituted C1 to C30 alkyl group, an unsubstituted C1 to C30 alkyl group, a substituted C1 to C30 alkoxy group, an unsubstituted C1 to C30 alkoxy group, a substituted C6 to C30 aryl group, an unsubstituted C6 to C30 aryl group, a substituted C3 to C30 heteroaryl group, an unsubstituted C3 to C30 heteroaryl group, a substituted C2 to C30 acyl group, an unsubstituted C2 to C30 acyl group, a halogen, a cyano group (-CN), a cyano-containing group, a nitro group, -SiR a R b R c (wherein R a, R b, and R c are independently one of hydrogen, a substituted C1 to C10 alkyl group, or an unsubstituted C1 to C10 alkyl group), or a combination thereof, and Y is a functional group represented by Chemical Formula 2A or Chemical Formula 2B, Ar 3 and Ar 4 are independently one of a substituted C6 to C30 arylene group, an unsubstituted C6 to C30 arylene group, a substituted C3 to C30 heteroarylene group, or an unsubstituted C3 to C30 heteroarylene group, and G is one of a single bond, S, Se, Te, O, NR a3, (CR b3 R c3) n, (C(R d3)=C(R e3)), SiR f3 R g3, or GeR h3 R i3 (wherein R a3, R b3, R c3, R d3, R e3, R f3, R g3, R h3, and R i3 are independently one of hydrogen, a halogen, a substituted C1 to C10 alkyl group, an unsubstituted C1 to C10 alkyl group, a substituted C6 to C10 aryl group, or an unsubstituted C6 to C10 aryl group, and optionally R d3 and R e3 are independently present or are linked with each other to provide a fused ring, and n is an integer of 1 or 2).