Heterocyclic compound, organic light-emitting device comprising same, manufacturing method therefor, and composition for organic layer

A heterocyclic compound represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• X is O;
• or S;
• N-Het is a monocyclic or polycyclic heterocyclic group substituted or unsubstituted, and comprising one or more Ns;
• Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted C1 to C60 alkyl group;
• a substituted or unsubstituted C6 to C60 aryl group;
• a substituted or unsubstituted C2 to C60 heteroaryl group;
• —P(═O)RR′;
• or —SiRR′R″;
• R3 to R5 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 C1 to C60 alkyl group;
• a substituted or unsubstituted C2 to C60 alkenyl group;
• a substituted or unsubstituted C2 to C60 alkynyl group;
• a substituted or unsubstituted C1 to C60 alkoxy group;
• a substituted or unsubstituted C3 to C60 cycloalkyl group;
• a substituted or unsubstituted C2 to C60 heterocycloalkyl group;
• a substituted or unsubstituted C6 to C60 aryl group;
• a substituted or unsubstituted C2 to C60 heteroaryl group;
• —P(═O)RR′;
• —SiRR′R″ and —NRR′, or two or more groups adjacent to each other bond to each other to form a substituted or unsubstituted C6 to C60 aliphatic or aromatic hydrocarbon ring or a substituted or unsubstituted C2 to C60 aliphatic or aromatic heteroring;
• L1 to L3 are the same as or different from each other, and each independently a direct bond;
• a substituted or unsubstituted C6 to C60 arylene group;
• or a substituted or unsubstituted C2 to C60 heteroarylene group;
• R, R′ and R″ are the same as or different from each other, and each independently a substituted or unsubstituted C1 to C60 alkyl group;
• a substituted or unsubstituted C6 to C60 aryl group;
• or a substituted or unsubstituted C2 to C60 heteroaryl group;
• p and q are an integer of 1 to 4;
• b, m and n are an integer of 0 to 4;
• a is an integer of 0 to 3;
• and
• when p, q, a, b, m and n are 2 or greater, substituents in the parentheses are the same as or different from each other.