A fused polycyclic heteroaromatic compound comprising one of a compound represented by Chemical Formula 1A, a compound represented by Chemical Formula 1B, and a combination thereof: wherein, in Chemical Formulae 1A and 1B, each of Ar 1 and Ar 2 are independently one of phenylene, naphthalene, and anthracene, and a is an integer ranging from 0 to 6, each of X 1 to X 4 are independently one of O, S, Se, Te, and N-R a, wherein each R a is independently one of hydrogen, a substituted or unsubstituted linear or branched C 1 to C 30 alkyl group, a substituted or unsubstituted C 2 to C 30 alkenyl group, a substituted or unsubstituted C 2 to C 30 alkynyl group, a substituted or unsubstituted C 7 to C 30 arylalkyl group, a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 1 to C 30 alkoxy group, -OR b, wherein R b is a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 4 to C 30 cycloalkyl group, -OR c, wherein R c is a substituted or unsubstituted C 4 to C 30 cycloalkyl group, a substituted or unsubstituted C 2 to C 30 heteroaryl group, -C(=O)R d, wherein R d is a substituted or unsubstituted C 1 to C 30 alkyl group, -S(=O) 2 R e, wherein R e is a substituted or unsubstituted C 1 to C 30 alkyl group, and -NHC(=O)OR f, wherein R f is a substituted or unsubstituted C 1 to C 30 alkyl group, each of R 1 to R 13 are independently one of hydrogen, a substituted or unsubstituted C 1 to C 30 alkyl group, a substituted or unsubstituted C 1 to C 30 alkoxy group, a substituted or unsubstituted C 2 to C 30 alkenyl group, a substituted or unsubstituted C 2 to C 30 alkynyl group, a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 2 to C 30 heteroaryl group, a substituted or unsubstituted C 7 to C 30 arylalkyl group, a substituted or unsubstituted C 2 to C 30 heteroarylalkyl group, a substituted or unsubstituted C 2 to C 30 alkylheteroaryl group, a substituted or unsubstituted C 5 to C 30 cycloalkyl group, and a substituted or unsubstituted C 2 to C 30 heterocycloalkyl group, n1 is 0 or 1, each of n2 and n3 are independently 0, 1, 2, or 3, when n1 is 0, n2 and n3 are an integer of 1, 2, or 3, and when n1 is 1, n1+n2+n3≥2. each of Ar 1 and Ar 2 are independently one of phenylene, naphthalene, and anthracene, and a is an integer ranging from 0 to 6, each of X 1 to X 4 are independently one of O, S, Se, Te, and N-R a, wherein each R a is independently one of hydrogen, a substituted or unsubstituted linear or branched C 1 to C 30 alkyl group, a substituted or unsubstituted C 2 to C 30 alkenyl group, a substituted or unsubstituted C 2 to C 30 alkynyl group, a substituted or unsubstituted C 7 to C 30 arylalkyl group, a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 1 to C 30 alkoxy group, -OR b, wherein R b is a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 4 to C 30 cycloalkyl group, -OR c, wherein R c is a substituted or unsubstituted C 4 to C 30 cycloalkyl group, a substituted or unsubstituted C 2 to C 30 heteroaryl group, -C(=O)R d, wherein R d is a substituted or unsubstituted C 1 to C 30 alkyl group, -S(=O) 2 R e, wherein R e is a substituted or unsubstituted C 1 to C 30 alkyl group, and -NHC(=O)OR f, wherein R f is a substituted or unsubstituted C 1 to C 30 alkyl group, each of R 1 to R 13 are independently one of hydrogen, a substituted or unsubstituted C 1 to C 30 alkyl group, a substituted or unsubstituted C 1 to C 30 alkoxy group, a substituted or unsubstituted C 2 to C 30 alkenyl group, a substituted or unsubstituted C 2 to C 30 alkynyl group, a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 2 to C 30 heteroaryl group, a substituted or unsubstituted C 7 to C 30 arylalkyl group, a substituted or unsubstituted C 2 to C 30 heteroarylalkyl group, a substituted or unsubstituted C 2 to C 30 alkylheteroaryl group, a substituted or unsubstituted C 5 to C 30 cycloalkyl group, and a substituted or unsubstituted C 2 to C 30 heterocycloalkyl group, n1 is 0 or 1, each of n2 and n3 are independently 0, 1, 2, or 3, when n1 is 0, n2 and n3 are an integer of 1, 2, or 3, and when n1 is 1, n1+n2+n3≥2.