Polymer semiconductors, stretchable polymer thin films, and electronic devices

A polymer semiconductor, comprising:

• a first structural unit represented by Chemical Formula 1 and a second structural unit represented by Chemical Formula 2:
• wherein, in Chemical Formula 1,
• R11 and R12 are each independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, —CORa, —OC(═O)Rb, —C(═O)ORb, —OC(═O)ORd, a halogen, a cyano group, or any combination thereof, wherein Ra to Rd are each independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, a halogen, a cyano group, or any combination thereof,
• L1 and L2 are each independently a single bond, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted divalent C3 to C30 heterocyclic group, fused rings thereof, or any combination thereof, and
• D1 is a substituted or unsubstituted C6 to C30 arylene group;
• a substituted or unsubstituted divalent C3 to C30 heterocyclic group including at least one of N, O, S, Se, Te, or Si;
• fused rings thereof, or any combination thereof,
• wherein, in Chemical Formula 2,
• R21, R22, R23, and R24 are each independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, —CORa, —OC(═O)Rb, —C(═O)ORb, —OC(═O)ORd, a halogen, a cyano group, or any combination thereof, wherein Ra to Rd are each independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, a halogen, a cyano group, or any combination thereof,
• X1 and X2 are each independently S, Se, or Te, and
• X1 and X2 are different from each other.