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

A compound represented by Chemical Formula 1:

• wherein, in Chemical Formula 1,
• R1 to R3 are independently one of 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 halogen, a cyano group (—CN), a cyano-containing group, or a combination thereof,
• R1 and R2 independently are present or linked with each other to provide a ring,
• Ar1 and Ar2 are independently one of a substituted or unsubstituted C6 to C30 arene group, a substituted or unsubstituted C3 to C30 heteroarene group, or a combination thereof in a condensed ring, and
• G is one of —(CRdRe)n—, —O—, —S—, —Se—, —N═, —NRf—, —SiRgRh, —SiRggRhh—, —GeRiRj—, —GeRiiRjj—, —(C(Rm)═C(Rn))—, —(C(Rmm)═C(Rnn))—, or a single bond, wherein Rd, Re, Rf, Rg, Rh, Ri, Rj, Rm, and Rn are independently one of hydrogen, a halogen, a substituted or unsubstituted C1 to C10 alkyl group, or a substituted or unsubstituted C6 to C10 aryl group, wherein Rgg, Rhh, Rii, Rjj, Rmm, and Rnn are independently one of a substituted or unsubstituted C1 to C10 alkyl group, or a substituted or unsubstituted C6 to C10 aryl group, and at least one pair of Rgg and Rhh, Rii and Rjj, or Rmm and Rnn are linked with each other to provide a ring structure, and n in —(CRdRe)n— is 1 or 2, and
• Ar3 is a cyclic group represented by one of Chemical Formula 2C and Chemical Formula 2D,
• wherein, in Chemical Formulas 2C and 2D,
• G1 and G2 independently are one of —S—, —Se—, —GeRxRy—, or —Te—, wherein Rx and Ry are the same or different and are independently one of hydrogen, a halogen, a substituted or unsubstituted C1 to C10 alkyl group, or a substituted or unsubstituted C6 to C10 aryl group,
• R11 and R12 are the same or different and are independently one of 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 C4 to C30 heteroaryl group, a halogen, a cyano group, a cyano-containing group, or a combination thereof, and
• * is a linking point.