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

A compound of Formula 1:

• in Formula 1,
• A ring is selected from the group consisting of the following Formula A-1 to A-4,
• X1 to X5 are each independently O, S, Se, Te, C(Ra)(Rb) or Si(Rc)(Rd),
• R1 to R4, Ra to Rd are each independently selected from the group consisting of hydrogen, deuterium, halogen, a C6-C60 aryl group, a fluorenyl group, a C2-C60 heterocyclic group containing at least one heteroatom of O, N, S, Si and P, a C3-C60 aliphatic ring group, a fused ring of a C3-C60 aliphatic ring and a C6-C60 aromatic ring, a C1-C30 alkyl group, a C2-C30 alkenyl group, a C2-C30 alkynyl group, a C1-C30 alkoxyl group, a C1-C30 alkylthio group, and a C6-C30 aryloxy group, and adjacent R1 groups may be bonded to each other to form a ring, Ra and Rb may be bonded to each other to form a ring, Rc and Rd may be bonded to each other to form a ring,
• a is an integer from 0 to 4, b is an integer from 0 to 2,
• L is selected from the group consisting of a single bond, a C6-C60 arylene group, a fluorenylene group, a C2-C60 heterocyclic group containing at least one heteroatom of O, N, S, Si and P, a C3-C60 aliphatic ring group, a fused ring of a C3-C60 aliphatic ring and a C6-C60 aromatic ring, a C1-C30 alkylene group, a C2-C30 alkenylene group, a C2-C30 alkynylene group, and a C1-C30 akoxylene group,
• Ac is selected from the group consisting of a C2-C60 heterocyclic group containing at least one heteroatom of O, N, S, Si and P, a C3-C60 aliphatic ring group, and a fused ring of a C3-C60 aliphatic ring and a C6-C60 aromatic ring, and Ac comprises one or more functional groups selected from the group consisting of C═O, C═S, C═Se, CN and CF3,
• L and R3 may be bonded to each other to form a ring, R3 and Ac may be bonded to each other to form a ring, and
• the aryl group, the arylene group, the fluorenyl group, the fluorenylene group, the heterocyclic group, the aliphatic ring group, the fused ring, the alkyl group, the alkylene group, the alkenyl group, the alkenylene group, the alkynyl group, the alkynylene group, the alkoxy group, the alkoxylene group, the arylthio group, the aryloxyl group, and the ring formed by adjacent groups may be each substituted with one or more substituents selected from the group consisting of deuterium, halogen, a siloxane group, a cyano group, a nitro group, a silane group unsubstituted or substituted with a C1-C20 alkyl group or a C6-C20 aryl group, a phosphine oxide substituted or unsubstituted with a C1-C20 alkyl group or a C6-C20 aryl group, C1-C20 alkylthio group, C1-C20 alkoxy group, C6-C30 aryloxy group, C6-C30 arylthio group, a C1-C20 alkyl group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, a C6-C30 aryl group, a fluorenyl group, a C2-C60 heterocyclic group comprising at least one heteroatom selected from the group consisting of O, N, S, Si and P, a C3-C30 aliphatic ring group, a fused ring of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, ═O, ═C(CN)2, and ═S.