Nitrogen-containing polycyclic compound and organic light emitting element using same

A compound represented by any one of the following Chemical Formulae 3 to 5:

• in Chemical Formula 3 to 5,
• R1 to R3 are the same as or different from each other, and are each independently selected from the group consisting of hydrogen;
• deuterium;
• halogen;
• a substituted or unsubstituted C1 to C60 alkyl;
• a substituted or unsubstituted C2 to C60 alkenyl;
• a substituted or unsubstituted C2 to C60 alkynyl;
• a substituted or unsubstituted C1 to C60 alkoxy;
• a substituted or unsubstituted C3 to C60 cycloalkyl;
• a substituted or unsubstituted C2 to C60 heterocycloalkyl;
• a substituted or unsubstituted C6 to C60 aryl;
• a substituted or unsubstituted C2 to C60 heteroaryl;
• —SiRR′R″, and —P(═O)RR′,
• R, R′, and R″ are the same as or different from each other, and are each independently selected from the group consisting of hydrogen;
• deuterium;
• a substituted or unsubstituted C1 to C60 alkyl;
• a substituted or unsubstituted C3 to C60 cycloalkyl;
• a substituted or unsubstituted C6 to C60 aryl;
• and a substituted or unsubstituted C2 to C60 heteroaryl,
• a is an integer of 1 to 5,
• b is an integer of 0 to 6,
• c is an integer of 0 to 8, and
• when a, b, and c are each 2 or more, a plurality of R1, R2, and R3 is each the same as or different from each other.