Heterocyclic compound, organic light-emitting diode comprising same, and composition for organic layer of organic light-emitting diode

A heterocyclic compound represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• L1 and L2 are the same as or different from each other, and each independently a direct bond;
• a substituted or unsubstituted arylene group having 6 to 60 carbon atoms;
• or a substituted or unsubstituted heteroarylene group having 2 to 60 carbon atoms;
• X is O;
• S;
• or NRa;
• Y1 to Y5 are the same as or different from each other, and each independently N or CRb, at least one or more of Y1 to Y5 are N, and when there are two or more CRbs, Rbs are the same as or different from each other;
• R1 is represented by the following Chemical Formula A;
• R2 to R9 are hydrogen;
• deuterium;
• a halogen group;
• a cyano group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted aryl group having 6 to 40 carbon atoms;
• or a substituted or unsubstituted heteroaryl group having 2 to 40 carbon atoms;
• Ra is a substituted or unsubstituted aryl group having 6 to 40 carbon atoms;
• Rb is selected from the group consisting of hydrogen;
• deuterium;
• a substituted or unsubstituted aryl group having 6 to 60 carbon atoms;
• and a substituted or unsubstituted heteroaryl group having 2 to 60 carbon atoms, or two or more groups adjacent to each other bond to each other to form a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 60 carbon atoms or a substituted or unsubstituted heteroring having 2 to 60 carbon atoms;
• m and n are each independently an integer of 0 to 3, and when m and n are each 2 or greater, substituents in the parentheses are the same as or different from each other;
• and
• p is 0 or 1,
• in Chemical Formula A,
• L11 and L12 are the same as or different from each other, and each independently a direct bond;
• a substituted or unsubstituted arylene group having 6 to 40 carbon atoms;
• or a substituted or unsubstituted heteroarylene group having 2 to 40 carbon atoms;
• Ar11 and Ar12 are the same as or different from each other, and each independently selected from the group consisting of a substituted or unsubstituted aryl group having 6 to 40 carbon atoms;
• and a substituted or unsubstituted heteroaryl group having 2 to 40 carbon atoms, or Ar11 and Ar12 bond to each other to form a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 60 carbon atoms or a substituted or unsubstituted heteroring having 2 to 60 carbon atoms;
• a and b are each 0 or 1;
• and
• means a position bonding to L1 of Chemical Formula 1.