Organic compound and an organic electroluminescent device using the same

An electroluminescent device comprising:

• an anode, a cathode, and one or more organic layer disposed between the anode and the cathode,
• wherein at least one of the one or more organic layer comprises a compound of the following Chemical Formula 1 or 2:
• wherein
• X1 and X2 are different from each other and are CR3 or N, wherein one of X1 and X2 is N and the other is CR3,
• R1 and R2 are the same as or different from each other, each independently being selected from:
• 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 nuclear atoms, a C1 to C40 alkyl group, a C6 to C60 aryl group, 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 arylphosphin oxide group, and a C6 to C60 arylamine group,
• Ar1 is a substituent of any one of the following Chemical Formulas F2 to F4:
• R3 is selected from:
• hydrogen, deuterium, halogen, a cyano group, a C1 to C40 alkyl group, a C6 to C60 aryl group, a heteroaryl group having 5 to 60 nuclear atoms,
• the alkyl group, the aryl group, and the heteroaryl group of R3 are each independently unsubstituted or substituted with one or more substituents of:
• deuterium, halogen, a cyano group, a nitro 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 nuclear atoms, a C1 to C40 alkyl group, a C6 to C60 aryl group, a heteroaryl group having 5 to 60 nuclear 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 when the substituents are plural in number, the substituents are the same as or different from each other, and
• the alkenyl group, the alkynyl group, the cycloalkyl group, the heterocycloalkyl group, the alkyl group, the aryl group, the alkyloxy group, the aryloxy group, the alkylsilyl group, the arylsilyl group, the alkylboron group, the arylboron group, the arylphosphine group, the arylphosphine oxide group and the arylamine group of R1 and R2 are each independently substituted or unsubstituted with one or more substituents of:
• deuterium, halogen, a cyano group, a nitro group, a C2 to C40 alkenyl group, a C2 to C40 alkynyl group, a C3 to C40 cycloalkyl group, a C1 to C40 alkyl group, a C6 to C60 aryl group, a heteroaryl group having 5 to 60 nuclear 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 when the substituents are plural in number, the substituents are the same as or different from each other, provided that when R1 is aryl, R2 is aryl, or both R1 and R2 are aryl, said aryl is not substituted with a heteroaryl group.