Compound for organic electrical element, organic electrical element using same, and electronic device thereof

A compound represented by Formula (1):

• wherein:
• 1) La is a direct bond;
• a phenylene group;
• a naphthylene group;
• a biphenylene group;
• or a phenanthrene group,
• 2) Ara is represented by any of Formulas (A-1) to (A-6):
• wherein:
• * means the position to be bonded,
• R1′ and R5′ are same or different from each other, and each is independently selected from the group consisting of hydrogen;
• deuterium;
• a C6-C20 aryl group;
• a C6-C20 aryl group substituted with deuterium, or an adjacent plurality of R1 or adjacent plurality of R5′ may be bonded to each other to form a ring,
• a is an integer from 0 to 5, e is an integer from 0 to 9,
• 3) R1, R2, R3 and R4, each being the same or different, are each independently hydrogen or deuterium,
• 4) a is an integer of 0 to 5, b is an integer of 0 to 6, c is an integer of 0 to 4, d is an integer of 0 to 7,
• wherein the phenylene group, naphthylene group, biphenylene group and phenanthrene group may be substituted with one or more substituents selected from the group consisting of deuterium;
• a C6-C20 aryl group;
• and a C6-C20 aryl group substituted with deuterium.