A fused polycyclic heteroaromatic compound comprising a structural unit represented by the following Chemical Formula 1: wherein the fused polycyclic heteroaromatic compound is represented by one of the following Formulae 1A to 1 G: wherein, in the above Chemical Formulae 1A to 1 G, each of X 1 to X 4 are independently one of O, S, Se, Te, N-R a, and CR b,wherein each of R a and R b are independently one of hydrogen, a substituted or unsubstituted linear or branched C 1 to C 30 alkyl 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, a substituted or unsubstituted C 6 to C 30 aryloxy group (-OR 11, wherein R 11 is a substituted or unsubstituted C 6 to C 30 aryl group), a substituted or unsubstituted C 4 to C 30 cycloalkyl group, a substituted or unsubstituted C 4 to C 30 cycloalkyloxy group (-OR 12, wherein R 12 is a substituted or unsubstituted C 4 to C 30 cycloalkyl group), a substituted or unsubstituted C 2 to C 30 heteroaryl group, an acyl group (-C(=O)R 13, wherein R 13 is a substituted or unsubstituted C 1 to C 30 alkyl group), a sulfonyl group (-S(=O) 2 R 14, wherein R 14 is a substituted or unsubstituted C 1 to C 30 alkyl group) and a carbamate group (-NHC(=O)OR 15, wherein R 15 is a substituted or unsubstituted C 1 to C 30 alkyl group), at least one of X 1 and X 2 is S, at least one of X 3 and X 4 is S, each of X 5 and X 6 are independently one of O, S, Se, Te, N-R a, and CR b R c wherein each of R a to R c are independently one of hydrogen, a substituted or unsubstituted linear or branched C 1 to C 30 alkyl 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, a substituted or unsubstituted C 6 to C 30 aryloxy group (-OR 11, wherein R 11 is a substituted or unsubstituted C 6 to C 30 aryl group), a substituted or unsubstituted C 4 to C 30 cycloalkyl group, a substituted or unsubstituted C 4 to C 30 cycloalkyloxy group (-OR 12, wherein R 12 is a substituted or unsubstituted C 4 to C 30 cycloalkyl group), a substituted or unsubstituted C 2 to C 30 heteroaryl group, an acyl group (-C(=O)R 13, wherein R 13 is a substituted or unsubstituted C 1 to C 30 alkyl group), a sulfonyl group (-S(=O) 2 R 14, wherein R 14 is a substituted or unsubstituted C 1 to C 30 alkyl group) and a carbamate group (-NHC(=O)OR 15, wherein R 15 is a substituted or unsubstituted C 1 to C 30 alkyl group), each of R 1 to R 6 are independently one of hydrogen, a halogen (-F, -Cl, -Br or -I), a substituted or unsubstituted linear or branched C 1 to C 30 alkyl group, a substituted or unsubstituted linear or branched C 2 to C 30 alkenyl group, a substituted or unsubstituted linear or branched C 2 to C 30 alkynyl 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, a substituted or unsubstituted C 2 to C 30 heterocycloalkyl group, a substituted or unsubstituted C 6 to C 30 aryl group, and a substituted or unsubstituted C 2 to C 30 heteroaryl group, each of R 100 to R 102 are independently one of hydrogen, a halogen (-F, -Cl, -Br or -I), a substituted or unsubstituted linear or branched C 1 to C 30 alkyl group, a substituted or unsubstituted linear or branched C 2 to C 30 alkenyl group, a substituted or unsubstituted linear or branched C 2 to C 30 alkynyl 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, a substituted or unsubstituted C 2 to C 30 heterocycloalkyl group, a substituted or unsubstituted C 6 to C 30 aryl group, and a substituted or unsubstituted C 2 to C 30 heteroaryl group, and x, y, and z are integers of 1 or 2.