Fused polycyclic heteroaromatic compound, organic thin film including the compound and electronic device including the organic thin film

A fused polycyclic heteroaromatic compound represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• X1 and X2 are each independently O, S, Se, Te or N—Ra, wherein Ra is hydrogen, a substituted or unsubstituted linear or branched C1 to C30 alkyl group, a substituted or unsubstituted C7 to C30 arylalkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryloxy group (—OR11, wherein R11 is a substituted or unsubstituted C6 to C30 aryl group), a substituted or unsubstituted C4 to C30 cycloalkyl group, a substituted or unsubstituted C4 to C30 cycloalkyloxy group (—OR12, wherein R12 is a substituted or unsubstituted C4 to C30 cycloalkyl group), a substituted or unsubstituted C2 to C30 heteroaryl group, an acyl group (—C(═O)R13, wherein R13 is a substituted or unsubstituted C1 to C30 alkyl group), a sulfonyl group (—S(═O)R14, wherein R14 is a substituted or unsubstituted C1 to C30 alkyl group), or a carbamate group (—NH2C(═O)OR15, wherein R15 is a substituted or unsubstituted C1 to C30 alkyl group),
• X3 and X4 are each independently O, S, Se, Te, N—Rb or CRcRd wherein Rb to Rd are each independently hydrogen, a substituted or unsubstituted linear or branched C1 to C30 alkyl group, a substituted or unsubstituted C7 to C30 arylalkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryloxy group (—OR11, wherein R11 is a substituted or unsubstituted C6 to C30 aryl group), a substituted or unsubstituted C4 to C30 cycloalkyl group, a substituted or unsubstituted C4 to C30 cycloalkyloxy group (—OR12, wherein R12 is a substituted or unsubstituted C4 to C30 cycloalkyl group), a substituted or unsubstituted C2 to C30 heteroaryl group, an acyl group (—C(═O)R13, wherein R13 is a substituted or unsubstituted C1 to C30 alkyl group), a sulfonyl group (—S(═O)R14, wherein R14 is a substituted or unsubstituted C1 to C30 alkyl group), or a carbamate group (—NH2C(═O)OR15, wherein R15 is a substituted or unsubstituted C1 to C30 alkyl group),
• R1, R2, R3, R4, R5, R6, R7, R8, and R9 are each independently hydrogen, halogen(—F, —Cl, —Br or —I), a substituted or unsubstituted linear or branched C1 to C30 alkyl group, a substituted or unsubstituted linear or branched C2 to C30 alkenyl group, a substituted or unsubstituted linear or branched C2 to C30 alkynyl group, a substituted or unsubstituted C7 to C30 arylalkyl group, a substituted or unsubstituted C2 to C30 heteroarylalkyl group, a substituted or unsubstituted C2 to C30 alkylheteroaryl group, a substituted or unsubstituted C5 to C30 cycloalkyl group, a substituted or unsubstituted C2 to C30 heterocycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C2 to C30 heteroaryl group,
• n is an integer ranging from 0 to 3, and
• a is an integer of 1 or 2.