Organic light emitting device

An organic light emitting device, comprising:

• a first electrode;
• a second electrode;
• and
• one or more organic material layers including a light emitting layer provided between the first electrode and the second electrode,
• wherein the light emitting layer includes a compound of the following Chemical Formula 1 and a compound of the following Chemical Formula 2:
• wherein in Chemical Formula 1:
• X1 to X8 are the same as or different from each other, and each independently is hydrogen, deuterium, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• Ar1 is a bond to R1 or R2 of the following Chemical Formula A;
• and
• Ar2 is a substituted or unsubstituted phenyl group;
• wherein in Chemical Formula A:
• a substituent among R1 and R2 not bonding to Ar1, and substituents R3 to R8 are the same as or different from each other, and each independently is hydrogen, deuterium, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, or bond to adjacent groups to form a substituted or unsubstituted ring;
• wherein in Chemical Formula 2:
• Y1 to Y8 are the same as or different from each other, and each independently is hydrogen, deuterium, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• Cy1 is a bond to R11 or R12 of the following Chemical Formula B;
• and
• Cy2 is a substituted or unsubstituted fused aryl group having 10 to 20 carbon atoms;
• wherein in Chemical Formula B:
• a substituent among R11 and R12 not bonding to Cy1, and substituents R13 to R18 are the same as or different from each other, and each independently is hydrogen, deuterium, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, or bond to adjacent groups to form a substituted or unsubstituted ring,
• wherein the compounds of Chemical Formula 1 and 2 are deuterated to 50% or greater.