A compound of the following chemical formula 2, 3 or 9; wherein Y1 to Y12 are the same as or different from each other, and are each independently N or CR, R1 is - m- n, L is substituted or unsubstituted C6 to C60 monocyclic or polycyclic arylene; or substituted or unsubstituted C2 to C60 monocyclic or polycyclic heteroarylene, Z is one selected from the group consisting of substituted or unsubstituted C6 to C60 monocyclic or polycyclic aryl; substituted or unsubstituted C2 to C60 monocyclic or polycyclic heteroaryl; -SiR11R12R13; and -P(=O)R14R15, m is an integer of 1 to 5, n is an integer of 1 to 3, when m and n are independently integers of 2 or more, multiple L and Z are the same as or different from each other, R is one selected from the group consisting of hydrogen; or at least two adjacent Rs are bonded to each other to form a substituted or unsubstituted monocyclic or polycyclic aliphatic or aromatic hydrocarbon ring; wherein "substituted or unsubstituted" refers to a group that may be substituted or may not be further substituted with one or more substituents selected from the group consisting of halogen; -CN; linear or branched C1 to C60 alkyl; C3 to C60 monocyclic or polycyclic cycloalkyl; C6 to C60 monocyclic or polycyclic aryl; C2 to C60 monocyclic or polycyclic heteroaryl; -SiR11R12R13; and - P(=O)R14R15, R11 to R15 are the same as or different from each other, and are each independently one selected from the group consisting of linear or branched substituted or unsubstituted C1 to C60 alkyl; substituted or unsubstituted C3 to C60 monocyclic or polycyclic cycloalkyl; substituted or unsubstituted C6 to C60 monocyclic or polycyclic aryl; and substituted or unsubstituted C2 to C60 monocyclic or polycyclic heteroaryl, and at least two of Ar1 to Ar5 are monocyclic or polycyclic substituted or unsubstituted C6 to C60 aryl; or monocyclic or polycyclic substituted or unsubstituted C2 to C60 heteroaryl, and the others are each independently hydrogen; deuterium; halogen; straight-chained or branched substituted or unsubstituted C1 to C60 alkyl; monocyclic or polycyclic substituted or unsubstituted C6 to C60 aryl; or monocyclic or polycyclic substituted or unsubstituted C2 to C60 heteroaryl. Y1 to Y12 are the same as or different from each other, and are each independently N or CR, R1 is - m- n, L is substituted or unsubstituted C6 to C60 monocyclic or polycyclic arylene; or substituted or unsubstituted C2 to C60 monocyclic or polycyclic heteroarylene, Z is one selected from the group consisting of substituted or unsubstituted C6 to C60 monocyclic or polycyclic aryl; substituted or unsubstituted C2 to C60 monocyclic or polycyclic heteroaryl; -SiR11R12R13; and -P(=O)R14R15, m is an integer of 1 to 5, n is an integer of 1 to 3, when m and n are independently integers of 2 or more, multiple L and Z are the same as or different from each other, R is one selected from the group consisting of hydrogen; or at least two adjacent Rs are bonded to each other to form a substituted or unsubstituted monocyclic or polycyclic aliphatic or aromatic hydrocarbon ring; wherein "substituted or unsubstituted" refers to a group that may be substituted or may not be further substituted with one or more substituents selected from the group consisting of halogen; -CN; linear or branched C1 to C60 alkyl; C3 to C60 monocyclic or polycyclic cycloalkyl; C6 to C60 monocyclic or polycyclic aryl; C2 to C60 monocyclic or polycyclic heteroaryl; -SiR11R12R13; and - P(=O)R14R15, R11 to R15 are the same as or different from each other, and are each independently one selected from the group consisting of linear or branched substituted or unsubstituted C1 to C60 alkyl; substituted or unsubstituted C3 to C60 monocyclic or polycyclic cycloalkyl; substituted or unsubstituted C6 to C60 monocyclic or polycyclic aryl; and substituted or unsubstituted C2 to C60 monocyclic or polycyclic heteroaryl, and at least two of Ar1 to Ar5 are monocyclic or polycyclic substituted or unsubstituted C6 to C60 aryl; or monocyclic or polycyclic substituted or unsubstituted C2 to C60 heteroaryl, and the others are each independently hydrogen; deuterium; halogen; straight-chained or branched substituted or unsubstituted C1 to C60 alkyl; monocyclic or polycyclic substituted or unsubstituted C6 to C60 aryl; or monocyclic or polycyclic substituted or unsubstituted C2 to C60 heteroaryl.