Compound for organic electronic element, organic electronic element using the same, and an electronic device thereof

A compound of Formula 1:

• wherein:
• X is O, S or N(Ar3),
• R1 to R4 are each independently selected from the group consisting of hydrogen, deuterium, halogen, a cyano group, a nitro group, a C6-C60 aryl 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 C1-C50 alkyl group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, a C1-C30 alkoxy group, a C6-C30 aryloxy group and —L′—N(Ra)(Rb), adjacent groups together may be bonded to each other to form a ring, and with the proviso that the case where all of R1 to R4 are hydrogen is excluded,
• a and d are each an integer of 0 to 4, b and c are each an integer of 0 to 3, where they are each an integer of 2 or more, each of a plurality of R′s, each of a plurality of R2s, each of a plurality of R3s, each of a plurality of R4s is the same or different from each other,
• Ar1 to Ar3 are independently selected from the group consisting of a C6-C60 aryl group, 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 C1-C50 alkyl group,
• L′ is selected from the group consisting of a single bond, a C6-C60 arylene group, a C3-C60 aliphatic ring, a C2-C60 heterocyclic group containing at least one heteroatom of O, N, S, Si, and P and a combination thereof,
• Ra and Rb are each independently selected from the group consisting of a C6-C60 aryl group, a C3-C60 aliphatic ring group, a C2-C60 heterocyclic group containing at least one heteroatom of O, N, S, Si, and P and a combination thereof.