| CPC H10K 85/636 (2023.02) [C07D 307/91 (2013.01); C07D 307/92 (2013.01); C07D 333/76 (2013.01); C07D 407/12 (2013.01); C07D 409/04 (2013.01); C07D 409/12 (2013.01); C09K 11/06 (2013.01); H10K 85/633 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1022 (2013.01); H10K 50/12 (2023.02); H10K 50/155 (2023.02); H10K 85/622 (2023.02); H10K 85/626 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02)] | 15 Claims |

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1. A compound of Formula 1:
![]() wherein:
1) A is
![]() 2) B is
![]() 3) X is O or S,
4) R1, R2, R3 and R4 are each independently the same or different, and each independently selected from the group consisting of hydrogen; deuterium; halogen; a cyano group; a nitro group; an C6-C60 aryl group; a fluorenyl group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si and P; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; a C1-C60 alkyl group; a C2-C60 alkenyl group; a C2-C60 alkynyl group; a C1-C60 alkoxy group; and a C6-C60 aryloxy group, and an adjacent plurality of R1s or of plurality of R2s or of plurality of R3s or of plurality of R4s may be bonded to each other to form an aromatic hydrocarbon ring,
5) R′ and R″ are each independently selected from the group consisting of an C6-C60 aryl group; a C1-C60 alkyl group,
6) a, b, c and d are each independently an integer of 0 to 3,
7) Ar1 is a hydrogen; or deuterium,
8) Ar2 is an C6-C60 aryl group; or a C1-C60 alkyl group,
9) Ar3 is a substituent represented by Formula Ar-5:
![]() wherein R13 and R14 are the same as the definition of R1 above,
o is an integer of 0 to 3, p is an integer of 0 to 4,
Y is O, S, CRxRy or NRz,
Rx, Ry and Rz are the same as the definition of R′ above,
10) L1, L2 and L3 are each independently a single bond or a C6-C60 arylene group,
11) * refers to the position to be bonded to L1 of Formula 1, or refers to the position to be bonded to L3 of Formula Ar-5,
12)
refers to the position to be bonded to L2 of Formula 1,13) wherein the aryl group, arylene group, heterocyclic group, fluorenyl group, fluorenylene group, aliphatic ring group, fused ring group, alkyl group, alkenyl group, alkynyl group, alkoxyl group and aryloxy group may be substituted with one or more substituents selected from the group consisting of deuterium;
halogen; a silane group; a siloxane group; a boron group; a germanium group; a cyano group; a nitro group; a C1-C20 alkylthio group; a C1-C20 alkoxy group; a C6-C20 aryloxy group; a C1-C20 alkyl group; a C2-C20 alkenyl group; a C2-C20 alkynyl group; a C6-C20 aryl group; a C6-C20 aryl group substituted with deuterium; a fluorenyl group; a C2-C20 heterocyclic group; a C3-C20 cycloalkyl group; a C1-C20 heteroalkyl group; a C7-C20 arylalkyl group; and a C8-C20 arylalkenyl group, and the substituents may be bonded to each other to form a saturated or unsaturated ring, wherein the term ‘ring’ means a C3-C60 aliphatic ring or a C6-C60 aromatic ring or a C2-C60 heterocyclic group or a fused ring formed by the combination thereof.
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