An organic semiconductor compound, comprising: at least one structural unit according to Chemical Formula 1, where, in Chemical Formula 1, R 1 is hydrogen, and R 2 is one of selected from a halogen, one of a substituted and unsubstituted C1-C20 linear or branched alkyl group, one of a substituted and unsubstituted C3-C20 cycloalkyl group, one of a substituted and unsubstituted linear or branched C1-C20 alkoxy group, one of a substituted and unsubstituted C3-C20 cycloalkyloxy group, one of a substituted and unsubstituted C6-C30 aryl group, one of a substituted and unsubstituted C6-C30 aryloxy group, one of a substituted and unsubstituted C2-C30 heteroaryl group, and a combination thereof, and selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, and a C3-C20 cycloalkyl group, each X is independently selected from -CR 3 =N-, -N=N-, and -NR 6 -, Y is selected from -CR 7 =CR 8 -, -O-, -S-, -Se-, and -NR 9 -, where R 3 and R 6 -R 9 are each independently one of selected from hydrogen, a halogen, one of a substituted and unsubstituted C1-C20 linear or branched alkyl group, one of a substituted and unsubstituted C3-C20 cycloalkyl group, one of a substituted and unsubstituted linear or branched C1-C20 alkoxy group, one of a substituted and unsubstituted C3-C20 cycloalkyloxy group, one of a substituted and unsubstituted C6-C30 aryl group, one of a substituted and unsubstituted C6-C30 aryloxy group, one of a substituted and unsubstituted C2-C30 heteroaryl group, and a combination thereof, and selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, and a C3-C20 cycloalkyl group, where one of one CH 2 group and a plurality of non-adjacent CH 2 groups are optionally substituted with -O-, -S-, -S 2 -, -CO-, -OCO-, -C O-, -CR 51 =CR 52 -, -C≡C-, or -SiR 53 R 54 -, where R 51 -R 54 are each independently selected from hydrogen, one of a substituted and unsubstituted C1-C15 linear or branched alkyl group, one of a substituted and unsubstituted C3-C15 cycloalkyl group, one of a substituted and unsubstituted C1-C15 alkoxy group, one of a substituted and unsubstituted C6-C15 aryl group, one of a substituted and unsubstituted C2-C15 heteroaryl group, and a combination thereof, and when Y is -CR 7 =CR 8 -, adjacent R 7 and R 8 may be linked to each other in a fused ring, Z is selected from one of a substituted and unsubstituted C6-C40 arylene group, one of a substituted and unsubstituted C4-C14 heteroaromatic ring group, and one of a substituted and unsubstituted C6-C30 condensed polycyclic group including a heteroaromatic ring group, and p and q denote a mole ratio of each structural unit, and p/(p+q) is 0.5 to 0.95. R 1 is hydrogen, and R 2 is one of selected from a halogen, one of a substituted and unsubstituted C1-C20 linear or branched alkyl group, one of a substituted and unsubstituted C3-C20 cycloalkyl group, one of a substituted and unsubstituted linear or branched C1-C20 alkoxy group, one of a substituted and unsubstituted C3-C20 cycloalkyloxy group, one of a substituted and unsubstituted C6-C30 aryl group, one of a substituted and unsubstituted C6-C30 aryloxy group, one of a substituted and unsubstituted C2-C30 heteroaryl group, and a combination thereof, and selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, and a C3-C20 cycloalkyl group, each X is independently selected from -CR 3 =N-, -N=N-, and -NR 6 -, Y is selected from -CR 7 =CR 8 -, -O-, -S-, -Se-, and -NR 9 -, where R 3 and R 6 -R 9 are each independently one of selected from hydrogen, a halogen, one of a substituted and unsubstituted C1-C20 linear or branched alkyl group, one of a substituted and unsubstituted C3-C20 cycloalkyl group, one of a substituted and unsubstituted linear or branched C1-C20 alkoxy group, one of a substituted and unsubstituted C3-C20 cycloalkyloxy group, one of a substituted and unsubstituted C6-C30 aryl group, one of a substituted and unsubstituted C6-C30 aryloxy group, one of a substituted and unsubstituted C2-C30 heteroaryl group, and a combination thereof, and selected from a C1-C20 alkyl group, a C1-C20 alkoxy group, and a C3-C20 cycloalkyl group, where one of one CH 2 group and a plurality of non-adjacent CH 2 groups are optionally substituted with -O-, -S-, -S 2 -, -CO-, -OCO-, -C O-, -CR 51 =CR 52 -, -C≡C-, or -SiR 53 R 54 -, where R 51 -R 54 are each independently selected from hydrogen, one of a substituted and unsubstituted C1-C15 linear or branched alkyl group, one of a substituted and unsubstituted C3-C15 cycloalkyl group, one of a substituted and unsubstituted C1-C15 alkoxy group, one of a substituted and unsubstituted C6-C15 aryl group, one of a substituted and unsubstituted C2-C15 heteroaryl group, and a combination thereof, and when Y is -CR 7 =CR 8 -, adjacent R 7 and R 8 may be linked to each other in a fused ring, Z is selected from one of a substituted and unsubstituted C6-C40 arylene group, one of a substituted and unsubstituted C4-C14 heteroaromatic ring group, and one of a substituted and unsubstituted C6-C30 condensed polycyclic group including a heteroaromatic ring group, and p and q denote a mole ratio of each structural unit, and p/(p+q) is 0.5 to 0.95.