Organic Light Emitting Device

An organic light emitting device comprising:

• a cathode;
• an anode;
• a light emitting layer provided between the cathode and the anode;
• a first organic material layer provided between the anode and the light emitting layer and including a compound of the following Chemical Formula 1;
• and
• a second organic material layer provided between the first organic material layer and the light emitting layer and including a compound of the following Chemical Formula 2:
• wherein, in Chemical Formula 1,
• L1 to L3 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 heteroarylene group, a to c are each an integer of 0 to 3, and when a to c are each 2 or greater, L1 to L3 are the same as or different from each other;
• Ar1 to Ar6 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heteroaryl group, or Ar1 and Ar2;
• Ar3 and Ar4;
• Ar5 and Ar6;
• Ar1 and L1;
• Ar3 and L2;
• or Ar5 and L3 bond to each other to form a monocyclic or multicyclic aromatic or aliphatic hydrocarbon ring or heteroring, 1 to n are each an integer of 0 to 2, and when 1 to n are each 2, —NAr1 Ar2, —NAr3Ar4 and —NAr5Ar6 are the same as or different from each other, and when 1 to n are each 0, hydrogen bonds to L1 to L3 instead of —NAr1Ar2, —NAr3Ar4 and —NAr5Ar6, respectively;
• X is NR′;
• O;
• or S, p is 0 or 1, and when p is 0, 2 carbons bonding to X directly bond;
• R and R′ are the same as or different from each other, and each independently hydrogen;
• deuterium;
• a nitrile group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted alkoxy group;
• a substituted or unsubstituted aryloxy group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted amine group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heteroaryl group;
• and
• d is an integer of 0 to 3,
• in Chemical Formula 2,
• Ar7 and Ar8 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heteroaryl group;
• R1 and R2 are the same as or different from each other, and each independently hydrogen;
• deuterium;
• a nitrile group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted alkoxy group;
• a substituted or unsubstituted aryloxy group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted amine group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heteroaryl group, or bond to each other to form a monocyclic or multicyclic aromatic or aliphatic hydrocarbon ring or heteroring;
• and
• R3 and R4 are the same as or different from each other, and each independently hydrogen;
• deuterium;
• a nitrile group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted alkoxy group;
• a substituted or unsubstituted aryloxy group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted amine group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heteroaryl group, e is an integer of 0 to 4, and when e is 2 or greater, R3s are the same as or different from each other, f is an integer of 0 to 3, and when f is 2 or greater, R4s are the same as or different from each other.