Compound and photoelectric device, image sensor, and electronic device including the same

A compound represented by Chemical Formula 1:

• wherein, in Chemical Formula 1,
• Ar1 is a substituted or unsubstituted C6 to C30 hydrocarbon cyclic group having at least one functional group selected from C═O, C═S, C═Se, and C═Te, a substituted or unsubstituted C6 to C30 heterocyclic group having at least one functional group selected from C═O, C═S, C═Se, and C═Te, or a fused ring thereof,
• Ar2 is a substituted or unsubstituted C6 to C30 arene group, a substituted or unsubstituted C3 to C30 heteroarene group, or a condensed ring thereof,
• X is —O—, —S—, —Se—, —Te—, —S(═O)—, —S(═O)2—, —NRa—, —SiRbRc—, —GeRdRe—, —(CRfRg)—, or —(C(Rh)═C(Ri))—, wherein Ra, Rb, Re, Rd, Re, Rd, Re, Rf, Rg, Rh, and Ri are independently hydrogen or a substituted or unsubstituted C1 to C10 alkyl group, and n is an integer of 1 or 2,
• R1 to R3 are independently hydrogen, deuterium, 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 heteroaryl group, a substituted or unsubstituted C2 to C30 acyl group, a halogen, a cyano group (—CN), a cyano-containing group, a nitro group, —SiRaRbRc (wherein Ra, Rb and Rc are independently hydrogen or a substituted or unsubstituted C1 to C10 alkyl group), or a combination thereof, and
• Y1 and Y2 are independently —NRa1—, —N═, —O—, —S—, —Se—, —Te—, —(CRa2)═, or —(CRa3Ra4)n—, provided that both Y1 and Y2 are not —NRa1—, —N═, —O—, —S—, —Se—, or —Te—, or —Y1-Y2— is —(C(Ra5)═C(Ra6))—, wherein Ra1, Ra2, Ra3, Ra4, Ra5, and Ra6 are independently hydrogen or a C1 to C10 alkyl group, and n is an integer of 1 or 2.