Heterocyclic compound and organic light emitting element comprising same

A heterocyclic compound represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• X is O or S;
• Y is a hole transferring group or a substituted or unsubstituted aryl group;
• Z is an electron transferring group;
• L1 and L2 are the same as or different from each other, and each independently a direct bond, a substituted or unsubstituted arylene group;
• or a substituted or unsubstituted heteroarylene group, p and q are each an integer of 0 to 3, and when p is 2 or greater, L1s are the same as or different from each other, and when q is 2 or greater, L2s are the same as or different from each other;
• and
• Ra and Rb are the same as or different from each other, and each independently selected from the group consisting of hydrogen;
• deuterium;
• halogen;
• a cyano group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted alkynyl group;
• a substituted or unsubstituted alkoxy group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted heterocycloalkyl group;
• a substituted or unsubstituted aryl group;
• a substituted or unsubstituted heteroaryl group;
• a substituted or unsubstituted phosphine oxide group;
• and a substituted or unsubstituted amine group, or two or more groups adjacent to each other bond to each other to form a substituted or unsubstituted aliphatic or aromatic hydrocarbon ring or heteroring, a and b are each an integer of 1 to 3, and when a is 2 or greater, Ras are the same as or different from each other, and when b is 2 or greater, Rbs are the same as or different from each other.