A compound of Formula 2 or Formula 3 below: wherein, R 1 to R 5 are each hydrogen, l, n, and p are 4, m is 1, and o is 3, X and Y are each independently O, S, C(R 6)(R 7), Si(R 8)(R 9) or Se, Z is N-(L 2 -Ar 2), O, S, C(R 10)(R 11), Si(R 12)(R 13), or Se, Ar 1 and Ar 2 are each independently selected from the group consisting of a C 6 -C 60 aryl group, a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, L 1, and L 2 are each independently selected from the group consisting of a single bond, a C 6 -C 60 arylene group, a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring or a C 6 -C 60 aromatic ring, an aliphatic hydrocarbon group, and these combinations, R 6 to R 13 of X, Y and Z are each independently selected from the group consisting of hydrogen, deuterium, a C 6 -C 24 aryl group, a C 1 -C 50 alkyl group, a C 2 -C 20 alkenyl group, a C 1 -C 30 alkoxyl group, and these combinations, R 6 and R 7, R 8 and R 9, R 10 and R 11, or R 12 and R 13 may be optionally linked each other to form a spiro compound, and when the symbols above are each the aryl group, heterocyclic group, fused ring group, alkyl group, alkenyl group, alkoxyl group, arylene group, or aliphatic hydrocarbon group, each of these may be optionally further substituted with one or more substituents selected from the group consisting of deuterium, halogen, a silane group, a siloxane group, a boron group, a germanium group, a cyano group, a nitro group, a C 1 -C 20 alkylthio group, a C 1 -C 20 alkoxyl group, a C 1 -C 20 alkyl group, a C 2 -C 20 alkenyl group, a C 2 -C 20 alkynyl group, a C 6 -C 20 aryl group, a C 6 -C 20 aryl group substituted with deuterium, a fluorenyl group, a C 2 -C 20 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si, and P, a C 3 -C 20 cycloalkyl group, a C 7 -C 20 arylalkyl group, a C 8 -C 20 arylalkenyl group, arylamine group and heteroarylamine group. R 1 to R 5 are each hydrogen, l, n, and p are 4, m is 1, and o is 3, X and Y are each independently O, S, C(R 6)(R 7), Si(R 8)(R 9) or Se, Z is N-(L 2 -Ar 2), O, S, C(R 10)(R 11), Si(R 12)(R 13), or Se, Ar 1 and Ar 2 are each independently selected from the group consisting of a C 6 -C 60 aryl group, a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, L 1, and L 2 are each independently selected from the group consisting of a single bond, a C 6 -C 60 arylene group, a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring or a C 6 -C 60 aromatic ring, an aliphatic hydrocarbon group, and these combinations, R 6 to R 13 of X, Y and Z are each independently selected from the group consisting of hydrogen, deuterium, a C 6 -C 24 aryl group, a C 1 -C 50 alkyl group, a C 2 -C 20 alkenyl group, a C 1 -C 30 alkoxyl group, and these combinations, R 6 and R 7, R 8 and R 9, R 10 and R 11, or R 12 and R 13 may be optionally linked each other to form a spiro compound, and when the symbols above are each the aryl group, heterocyclic group, fused ring group, alkyl group, alkenyl group, alkoxyl group, arylene group, or aliphatic hydrocarbon group, each of these may be optionally further substituted with one or more substituents selected from the group consisting of deuterium, halogen, a silane group, a siloxane group, a boron group, a germanium group, a cyano group, a nitro group, a C 1 -C 20 alkylthio group, a C 1 -C 20 alkoxyl group, a C 1 -C 20 alkyl group, a C 2 -C 20 alkenyl group, a C 2 -C 20 alkynyl group, a C 6 -C 20 aryl group, a C 6 -C 20 aryl group substituted with deuterium, a fluorenyl group, a C 2 -C 20 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si, and P, a C 3 -C 20 cycloalkyl group, a C 7 -C 20 arylalkyl group, a C 8 -C 20 arylalkenyl group, arylamine group and heteroarylamine group.