Organic light emitting device

An organic light emitting device comprising:

• a first electrode;
• a second electrode provided opposite to the first electrode;
• and
• a first organic material layer and a second organic material layer provided between the first electrode and the second electrode,
• wherein the first organic material layer includes a compound of the following Chemical Formula 1;
• and
• the second organic material layer includes a compound of the following Chemical Formula 2:
• in Chemical Formula 1,
• L1 and L2 are the same as or different from each other, and each independently a direct bond;
• or a substituted or unsubstituted arylene group;
• R1 and R2 are the same as or different from each other, and each independently hydrogen;
• deuterium;
• a halogen group;
• a cyano group;
• a nitro group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted haloalkyl group;
• a substituted or unsubstituted haloalkoxy group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heterocyclic group, or bond to adjacent groups to form a substituted or unsubstituted ring;
• n1 is an integer of 0 to 7, and when n1 is 2 or greater, the two or more R1s are the same as or different from each other;
• n2 is an integer of 0 to 9, and when n2 is 2 or greater, the two or more -L2-R2s are the same as or different from each other;
• and
• n3 is 1 or 2, and when n3 is 2, substituents in the two parentheses are the same as or different from each other, and 1≤n2+n3≤10,
• in Chemical Formula 2,
• at least one of X1 to X3 is N, and the rest are CR;
• R and Ar1 to Ar3 are the same as or different from each other, and each independently hydrogen;
• deuterium;
• a cyano group;
• a nitrile group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted haloalkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heterocyclic group, or bond to adjacent groups to form a substituted or unsubstituted ring, and at least one of Ar1 to Ar3 is of the following Chemical Formula 3;
• L11 to L13 are the same as or different from each other, and each independently a direct bond;
• a substituted or unsubstituted arylene group;
• or a substituted or unsubstituted divalent heterocyclic group;
• and
• m1 to m3 are each an integer of 0 to 3, and when m1 to m3 are each 2 or greater, substituents in the two or more parentheses are the same as or different from each other,
• in Chemical Formula 3,
• any one of R11 to R26 is linked to any one of L11 to L13, and the rest are hydrogen;
• deuterium;
• a cyano group;
• a nitrile group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heterocyclic group, or bond to adjacent groups to form a substituted or unsubstituted ring.