Organic compound and organic electroluminescent device using same

A compound represented by Chemical Formula 1:

• wherein in Chemical Formula 1,
• X1 to X3 are the same as or different from each other and are each independently C(R6) or N, provided that at least two of X1 to X3 are N,
• Y1 to Y2 are the same as or different from each other and are each independently selected from the group consisting of O, S, NR11,
• Ar1 and Ar2 are the same as or different from each other and are each independently selected from the group consisting of a C1-C40 alkyl group, a C2-C40 alkenyl group, a C2-C40 alkynyl group, a C3-C40 cycloalkyl group, a heterocycloalkyl group having 3 to 40 ring atoms, a C6-C60 aryl group, a heteroaryl group having 5 to 60 ring atoms, a C1-C40 alkyloxy group, a C6-C60 aryloxy group, a C3-C40 alkylsilyl group, a C6-C60 arylsilyl group, a C1-C40 alkylboron group, a C6-C60 arylboron group, a C6-C60 arylphosphine group, a C6-C60 arylphosphine oxide group and a C6-C60 arylamine group, or combine with an adjacent group to form a fused ring;
• R1 to R6 and R11 are the same as or different from one another and are each independently selected from the group consisting of a hydrogen, a deuterium (D), a halogen, a cyano group, a nitro group, a C1-C40 alkyl group, a C2-C40 alkenyl group, a C2-C40 alkynyl group, a C3-C40 cycloalkyl group, a heterocycloalkyl group having 3 to 40 ring atoms, a C6-C60 aryl group, a heteroaryl group having 5 to 60 ring atoms, a C1-C40 alkyloxy group, a C6-C60 aryloxy group, a C3-C40 alkylsilyl group, a C6-C60 arylsilyl group, a C1-C40 alkylboron group, a C6-C60 arylboron group, a C6-C60 aryl phosphine group, a C6-C60 arylphosphine oxide group, and a C6-C60 arylamine group, or combine with an adjacent group to form a fused ring;
• L is selected from the group consisting of a C6 to C18 arylene group and a heteroarylene group having 5 to 18 nuclear atoms,
• a is an integer of 1 to 5, and when a is 2 or more, a plurality of L groups is the same as or different from each other,
• o, p, q, and s are each independently an integer of 0 to 4, r is an integer of 0 to 3, and the arylene group, the heteroarylene group of L;
• and the alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, aryloxy group, alkyloxy group, cycloalkyl group, heterocycloalkyl group, alkylsilyl group, arylsilyl group, alkylboron group, arylboron group, arylphosphine group, arylphosphine oxide group, and arylamine group of Ar1 to Ar2, R1 to R6 and R11 may be each independently substituted with at least one substituent selected from the group consisting of a deuterium (D), a halogen, a cyano group, a nitro group, a C1 to C40 alkyl group, a C2 to C40 alkenyl group, a C2 to C40 alkynyl group, a C3 to C40 cycloalkyl group, a heterocycloalkyl group having 3 to 40 ring atoms, a C6 to C60 aryl group, a heteroaryl group having 5 to 60 ring atoms, a C1 to C40 alkyloxy group, a C6 to C60 aryloxy group, a C1 to C40 alkylsilyl group, a C6 to C60 arylsilyl group, a C1 to C40 alkylboron group, a C6 to C60 arylboron group, a C6 to C60 arylphosphine group, a C6 to C60 arylphosphine oxide group, and a C6 to C60 arylamine group, and wherein when the substituent is present in a plural number, they may be the same or different from each other.