Heterocyclic compound and organic light emitting device comprising same

A heterocyclic compound represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• L1 to L4 are the same as or different from each other, and each is independently a direct bond;
• or an unsubstituted phenylene group,
• Ar1 of Chemical Formula 1 is represented by any one of the following chemical formulae,
• Ar2 is an unsubstituted phenyl group, an unsubstituted biphenyl group;
• an unsubstituted terphenyl group, an unsubstituted naphthyl group, an unsubstituted phenanthrenyl group, an unsubstituted dimethylfluorenyl group, an unsubstituted diphenylfluorenyl group, an unsubstituted dibenzofuran group, an unsubstituted dibenzothiophene group, or an unsubstituted spirobifluorenyl group;
• R1 and R2 are the same as or different from each other, and each is independently an unsubstituted methyl group;
• an unsubstituted phenyl group;
• or two or more groups adjacent to each other bonded to each other to form an unsubstituted spirobifluorenyl group,
• X1 to X3 are the same as or different from each other, and each is independently hydrogen;
• or deuterium;
• k, l, m and n are each independently an integer of 1 to 3;
• a is an integer of 1 to 6;
• b is an integer of 1 to 3;
• c is an integer of 1 to 4;
• and
• when k, l, m, n, a, b and c are 2 or greater, substituents in the parentheses are the same as or different from each other.