Compound and organic light emitting device comprising same

A compound of Chemical Formula 1:

• wherein:
• R1 and R2 are each independently any one selected from the group consisting of hydrogen, deuterium, a halogen, a nitrile group, a nitro group, a hydroxyl 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 aralkylamine group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted arylphosphine group, a substituted or unsubstituted phosphine oxide group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group including one or more of N, O, S, Si and Se atoms;
• a and b are each independently an integer of 1 to 3;
• L1 and L2 are each independently a direct bond or a substituted or unsubstituted arylene group;
• Ar1 and Ar2 are each independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group;
• and
• A is any one group selected from the following formulae:
• wherein:
• X1 is O, S or CR3R4;
• X2 is O, NR or S;
• Y9 and Y10 are each independently N or CR5;
• at least one of Y9 and Y10 is N;
• and
• at least two of Z1 to Z4 are N and the others are C or CR6,
• wherein R and R3 to R6 are each independently any one selected from the group consisting of hydrogen, deuterium, a halogen, a nitrile group, a nitro group, a hydroxyl 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 aralkylamine group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted arylphosphine group, a substituted or unsubstituted phosphine oxide group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group including one or more of N, O, S, Si and Se atoms;
• and
• each A independently is unsubstituted or substituted with a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.