Organic electric element comprising compound for organic electric element and electronic device thereof

An organic electric element comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, wherein the organic material layer comprises an emission-auxiliary layer formed between the first electrode and a light emitting layer and the emission-auxiliary layer comprises a compound represented by the following Formula 1:

• wherein:
• X is O or S,
• Ra1, Rb1, Ra2 and Rb2 are each independently a C1-C50 alkyl group or a C6-C60 aryl group;
• or Ra1 and Rb1 together or Ra2 and Rb2 together are bonded to each other to form a C6-C60 aromatic hydrocarbon 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-C60 aliphatic ring, or a fused ring group formed by a C3-C60 aliphatic ring with a C6-C60 aromatic ring, provided that both Ra1 and Rb1 are the aryl group, or both Ra2 and Rb2 are the aryl group, or Ra1 and Rb1 together form the ring, or Ra2 and Rb2 together form the ring,
• R1 to R4, and R6 to R9 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 fused ring group formed by a C3-C60 aliphatic ring with a C6-C60 aromatic ring, a C1-C60 alkyl group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, a C1-C30 alkoxyl group, a C6-C30 aryloxy group and -L′-N(R′)(R″), or adjacent groups of R1 to R9 are bonded to each other to form a C6-C60 aromatic hydrocarbon 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-C60 aliphatic ring, or a fused ring group formed by a C3-C60 aliphatic ring with a C6-C60 aromatic ring,
• R5 is hydrogen, deuterium, or a C6-C60 aryl group;
• or adjacent groups of R5 may form a C6-C60 aromatic hydrocarbon group,
• a, d, e, g and h are each represent an integer of 0-4, b, c, f and i are each represent an integer of 0-3,
• L′ is selected from the group consisting of a single bond, a C6-C60 arylene group, a fluorenylene group, a fused ring group formed by a C3-C60 aliphatic ring with a C6-C60 aromatic ring, and a C2-C60 heterocyclic group,
• R′ and R″ are each independently selected from the group consisting of a C6-C60 aryl group, a fluorenyl group, a fused ring group formed by a C3-C60 aliphatic ring with a C6-C60 aromatic ring, and a C2-C60 heterocyclic group containing at least one heteroatom of O, N, S, Si, and P, and
• the above Ra1, Rb1, Ra2, Rb2, R1 to R9, L′, R′, R″, a ring formed by Ra1 and Rb1, a ring formed by Ra2 and Rb2, and a ring formed by adjacent groups of R1-R9 may be each optionally substituted with one or more substituents selected from the group consisting of deuterium, halogen, a silane group unsubstituted or substituted with a C1-C20 alkyl group or a C6-C20 aryl group, a siloxane group, a boron group, a germanium group, a cyano group, a nitro group, a C1-C20 alkylthio group, a C1-C20 alkoxyl 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 containing at least one heteroatom of O, N, S, Si, and P, a C3-C20 cycloalkyl group, a C7-C20 arylalkyl group, and a C8-C20 arylalkenyl group.