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

An organic photoelectric device comprising:

• a first electrode and a second electrode facing each other;
• and
• an active layer between the first electrode and the second electrode, the active layer including a compound represented by Chemical Formula 1:
• wherein, in Chemical Formula 1,
• Ar is one of a substituted or unsubstituted 5-membered ring, a substituted or unsubstituted 6-membered ring, and a condensed ring of two or more of the foregoing rings,
• X is one of Se, Te, S(═O), S(═O)2, and SiRaRb, wherein Ra and Rb are independently one of hydrogen and a substituted or unsubstituted C1 to C10 alkyl group,
• each of Ar1 and Ar2 are independently one of a substituted or unsubstituted C6 to C30 aryl group and a substituted or unsubstituted C3 to C30 heteroaryl group, and
• each of R1 to R3 are independently one of hydrogen, a substituted or unsubstituted C1 to C30 alkyl 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, and a combination thereof,
• wherein the compound has a maximum absorption wavelength (λmax) in a wavelength region of greater than about 530 nm and less than or equal to about 575 nm.