A compound represented by Chemical Formula 1: wherein, in Chemical Formula 1, X is O, S, Se, Te, SO, SO 2, NR a, CR b R c, or SiR d R e, Y 1 and Y 2 are independently CR f or N, one of Z 1 or Z 2 is S and another of Z 1 or Z 2 is O, S, Se, Te, or NR 9, Q is a substituted or unsubstituted C3 to C30 quinoidal ring, Q being different from 5-membered quinoidal ring including X, Y 1, and Y 2, R 1 and R 2 are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C1 to C30 alkylthio group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a halogen, or a combination thereof, R a to R g are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a halogen, a cyano group, or a combination thereof, R 1 and R 2 are independently present or are linked to each other to form a ring, R b and R c are independently present or are linked to each other to form a ring, R d and R e are independently present or are linked to each other to form a ring, adjacent R f 's are independently present or are linked to each other to form a ring, and the substituent of the substituted C3 to C30 quinoidal ring, C1 to C30 alkyl group, C1 to C30 alkoxy group, C1 to C30 alkylthio group, C6 to C30 aryl group, C3 to C30 heterocyclic group, and silyl group is selected from: a halogen atom, a hydroxy group, an alkoxy group, a nitro group, a cyano group, an amino group, an azido group, an amidino group, a hydrazino group, a hydrazono group, a carbonyl group, a carbamyl group, a thiol group, an ester group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a silyl group, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C2 to C20 alkynyl group, a C6 to C30 aryl group, a C7 to C30 arylalkyl group, a C1 to C30 alkoxy group, a C1 to C30 alkylthio group, a C1 to C20 heteroalkyl group, a C3 to C20 heteroaryl group, a C3 to C20 heteroarylalkyl group, a C3 to C30 cycloalkyl group, a C3 to C15 cycloalkenyl group, a C6 to C15 cycloalkynyl group, a C3 to C30 heterocycloalkyl group, or a combination thereof. X is O, S, Se, Te, SO, SO 2, NR a, CR b R c, or SiR d R e, Y 1 and Y 2 are independently CR f or N, one of Z 1 or Z 2 is S and another of Z 1 or Z 2 is O, S, Se, Te, or NR 9, Q is a substituted or unsubstituted C3 to C30 quinoidal ring, Q being different from 5-membered quinoidal ring including X, Y 1, and Y 2, R 1 and R 2 are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C1 to C30 alkylthio group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a halogen, or a combination thereof, R a to R g are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a halogen, a cyano group, or a combination thereof, R 1 and R 2 are independently present or are linked to each other to form a ring, R b and R c are independently present or are linked to each other to form a ring, R d and R e are independently present or are linked to each other to form a ring, adjacent R f 's are independently present or are linked to each other to form a ring, and the substituent of the substituted C3 to C30 quinoidal ring, C1 to C30 alkyl group, C1 to C30 alkoxy group, C1 to C30 alkylthio group, C6 to C30 aryl group, C3 to C30 heterocyclic group, and silyl group is selected from: a halogen atom, a hydroxy group, an alkoxy group, a nitro group, a cyano group, an amino group, an azido group, an amidino group, a hydrazino group, a hydrazono group, a carbonyl group, a carbamyl group, a thiol group, an ester group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a silyl group, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C2 to C20 alkynyl group, a C6 to C30 aryl group, a C7 to C30 arylalkyl group, a C1 to C30 alkoxy group, a C1 to C30 alkylthio group, a C1 to C20 heteroalkyl group, a C3 to C20 heteroaryl group, a C3 to C20 heteroarylalkyl group, a C3 to C30 cycloalkyl group, a C3 to C15 cycloalkenyl group, a C6 to C15 cycloalkynyl group, a C3 to C30 heterocycloalkyl group, or a combination thereof.