Heterocyclic compound and organic light-emitting device comprising same

A heterocyclic compound represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• R1 and R2 are the same as or different from each other, and each independently a halogen group;
• a substituted or unsubstituted C1 to C60 alkyl group;
• or a substituted or unsubstituted C6 to C60 aryl group;
• L1 and L2 are the same as or different from each other, and each independently a direct bond;
• a phenylene group;
• or a biphenylene group;
• Ar1 is represented by any one of the following structural formulae:
• Z1 is a phenyl group substituted with deuterium;
• a phenanthrenyl group, a triphenylenyl group;
• a terphenyl group;
• a dimethylfluorenyl group;
• a diphenylfluorenyl group;
• a spirobifluorenyl group;
• a dimethyl-11H-benzo[a]fluorenyl group;
• a dibenzofuran group;
• or a dibenzothiophene group;
• R3 to R11 are the same as or different from each other, and each independently selected from the group consisting of hydrogen;
• deuterium;
• a halogen group;
• and —CN;
• wherein “substituted or unsubstituted” means being substituted with one or more substituents selected from the group consisting of C1 to C60 linear or branched alkyl;
• C6 to C60 monocyclic or polycyclic aryl;
• C2 to C60 monocyclic or polycyclic heteroaryl;
• —SiRR′R″;
• and —P(═O)RR′;
• or being unsubstituted,
• R, R′ and R″ are the same as or different from each other, and each independently hydrogen;
• a substituted or unsubstituted C1 to C40 alkyl group;
• or a substituted or unsubstituted C6 to C40 aryl group;
• and
• m, n and p are an integer of 1 to 6, and when m, n and p are 2 or greater, two or more substituents in the parentheses are the same as or different from each other.