Compound and organic light emitting device comprising the same

An organic light emitting device, comprising:

• a first electrode;
• a second electrode that is provided opposite to the first electrode;
• and
• one or more organic material layers that are provided between the first electrode and the second electrode, wherein at least one layer of the organic material layers comprises a compound of Chemical Formula 1, and the organic material layer comprising the compound is a light emitting layer:
• wherein in the Chemical Formula 1:
• each X is independently N or CH, provided that at least one of X is N;
• Y is O or S;
• each Ar is independently substituted or unsubstituted C6-60 aryl;
• or substituted or unsubstituted C5-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S;
• R1, R2, and R3 are each independently hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-60 alkyl, substituted or unsubstituted C1-60 alkoxy, substituted or unsubstituted C2-60 alkenyl, substituted or unsubstituted C2-60 alkynyl, substituted or unsubstituted C3-60 cycloalkyl, substituted or unsubstituted C6-60 aryl, or substituted or unsubstituted C2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S;
• each R4 is independently hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-60 alkyl, substituted or unsubstituted C1-60 alkoxy, substituted or unsubstituted C2-60 alkenyl, substituted or unsubstituted C2-60 alkynyl, substituted or unsubstituted C3-60 cycloalkyl, substituted or unsubstituted C6-60 aryl, or substituted or unsubstituted C2-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, or two adjacent Ras combine with each other to form a C4-60 aliphatic or aromatic ring;
• n1, n2, and n3 are each independently 0 or 1;
• and
• n4 is an integer of 1 to 4,
• provided that at least one of Ar is substituted with one or more deuterium, at least one of R1, R2, R3, or R4 is substituted with one or more deuterium, or at least one of R1, R2, R3, and R4 is deuterium;
• wherein the light emitting layer further comprises a compound of the following Chemical Formula 2:
• wherein in the Chemical Formula 2:
• Ar1 and Ar2 are independently substituted or unsubstituted C6-60 aryl or substituted or unsubstituted C5-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S;
• R7 and R8 are each independently hydrogen, deuterium, halogen, cyano, nitro, amino, substituted or unsubstituted C1-60 alkyl, substituted or unsubstituted C3-60 cycloalkyl, substituted or unsubstituted C2-60 alkenyl, substituted or unsubstituted C6-60 aryl, or substituted or unsubstituted C5-60 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S;
• and
• p and q are each independently an integer of 0 to 7.