Organic light emitting diode

An organic light emitting device, comprising:

• a positive electrode;
• a negative electrode;
• and
• a first organic material layer and a second organic material layer provided between the positive electrode and the negative electrode,
• wherein the first organic material layer comprises a compound of the following Formula 1, and
• the second organic material layer comprises a compound of the following Formula 2:
• wherein in Formula 1:
• L101 and L102 are the same as or different from each other, and are each independently a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group;
• R11 to R18 are deuterium, or adjacent substituents are bonded to each other to form a ring substituted with deuterium;
• Ar101 and Ar102 are the same as or different from each other, and are each independently a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, or are linked to an adjacent substituent to form a substituted or unsubstituted ring;
• m1 and m2 are each an integer from 0 to 5;
• when m1 is 2 or higher, the L101s are the same as or different from each other, and
• when m2 is 2 or higher, the L102s are the same as or different from each other, and
• the compound of Formula 1 is at least 40% or more deuterated;
• wherein in Formula 2:
• Y is O or S;
• R21 to R24 are the same as or different from each other, and are each independently hydrogen, deuterium, a nitrile group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, or are the following Formula 3, or adjacent substituents are bonded to each other to form a substituted or unsubstituted ring;
• at least one of R21 and R22 is the following Formula 3;
• r21 to r24 are the same as or different from each other, and are each independently an integer from 0 to 4, and when r21 is 2 or higher, the R21s are the same as or different from each other, and when r22 is 2 or higher, the R22s are the same as or different from each other, and when r23 is 2 or higher, the R23s are the same as or different from each other, and when r24 is 2 or higher, the R24s are the same as or different from each other;
• wherein in Formula 3:
• X1 is N or C(R31), X2 is N or C(R32), X3 is N or C(R33), and one or more of X1 to X3 are N;
• R31, R32, and R33 are the same as or different from each other, and are each independently hydrogen, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, or are bonded to Ar1 or Ar2 to form a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted hetero ring;
• Ar1 and Ar2 are the same as or different from each other, and are each independently an aryl group which is unsubstituted or substituted with R41, or a heterocyclic group which is unsubstituted or substituted with R42, or are bonded to R31, R32, or R33 to form a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted hetero ring;
• R41 and R42 are the same as or different from each other, and are each independently one selected from the group consisting of deuterium, a halogen group, a nitrile group, an alkyl group, a haloalkyl group, an alkoxy group, a silyl group, an aryl group, and a heterocyclic group, or a group to which two or more substituents are linked;
• L is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group;
• m is an integer from 0 to 4, and when m is 2 or higher, the Ls are the same as or different from each other;
• and
• * is a moiety bonded to Formula 2.