Asymmetric fused polyheteroaromatic compound, organic thin film including the asymmetric fused polyheteroaromatic compound, and electronic device including the organic thin film

A fused polycyclic heteroaromatic compound represented by the following Chemical Formulae 1A to 1B:

• wherein, in the Chemical Formulae 1A and 1B,
• each of X1, X2, and X3 are independently one of O, S, Se, Te, and N—Ra,
• each of R3, R6 to R8, and Ra are independently one of hydrogen, a linear or branched C1 to C30 alkyl group, a C7 to C30 arylalkyl group, a C6 to C30 aryl group, a C1 to C30 alkoxy group, a C6 to C30 aryloxy group (—ORb, wherein Rb is a C6 to C30 aryl group), a C4 to C30 cycloalkyl group, a C4 to C30 cycloalkyloxy group (—ORc, wherein Rc is a C4 to C30 cycloalkyl group), a C2 to C30 heteroaryl group, and a halogen, and
• R1 and R2 are linked to each other to provide one of a substituted or unsubstituted C6 to C30 aromatic ring and a C2 to C30 hetero aromatic ring except a thiophene ring,
• wherein the fused polycyclic heteroaromatic compound has an asymmetric structure.