Spiro compound and organic light-emitting element comprising same

An organic light emitting device comprising:

• a first electrode;
• a second electrode disposed to face the first electrode;
• and
• an organic material layer having one or more layers disposed between the first electrode and the second electrode,
• wherein the organic material layer comprises an electron blocking layer, and the electron blocking layer comprises a compound represented by the following Chemical Formula 1:
• in Chemical Formula 1,
• Y is O, S, or SiR11R12,
• X is NAr,
• Ar is represented by (L1)n-Ar1,
• L1 is a direct bond;
• a substituted or unsubstituted arylene group;
• or a substituted or unsubstituted heteroarylene, n is an integer from 0 to 2, and when n is 2, L1's are the same as or different from each other,
• Ar1 is a substituted or unsubstituted heterocyclic group;
• a substituted or unsubstituted arylamino group;
• or a substituted or unsubstituted arylphosphine group, and
• R1 to R8 are the same as or different from each other, and are each independently hydrogen;
• deuterium;
• a halogen group;
• a nitrile group;
• a nitro group;
• a hydroxy group;
• a carbonyl group;
• an ester group;
• an imide group;
• an amino group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted boron 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 alkylthioxy group;
• a substituted or unsubstituted arylthioxy group;
• a substituted or unsubstituted alkylsulfoxy group;
• a substituted or unsubstituted arylsulfoxy group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted aralkyl group;
• a substituted or unsubstituted aralkenyl group;
• a substituted or unsubstituted alkylaryl group;
• a substituted or unsubstituted alkylamino group;
• a substituted or unsubstituted aralkylamino group;
• a substituted or unsubstituted heteroarylamino group;
• a substituted or unsubstituted arylamino group;
• a substituted or unsubstituted arylheteroarylamino group;
• a substituted or unsubstituted arylphosphine group;
• a substituted or unsubstituted phosphine oxide group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heterocyclic group, or are optionally bonded to an adjacent group to form a ring,
• R11 and R12 are the same as or different from each other, and are each independently hydrogen;
• a substituted or unsubstituted alkyl group;
• or a substituted or unsubstituted aryl group,
• p, s, r, and u are each an integer from 0 to 4, q is an integer from 0 to 3, t is an integer from 0 to 2, and when p, q, r, s, t, and u are each 2 or more, each of R3 to R8 is the same as or different from each other.