Patent ID: 8367798

Claim:
A conjugated polymer comprising a repeated unit having the structure of formula (I) wherein A1, A2, R1 and R2 are independently selected from the group consisting of a proton, an alkyl group comprising up to 18 carbon atoms, an alkoxy group comprising up to 18 carbon atoms, cyano, nitro, aryls and substituted aryls, and wherein Ar is selected from the group consisting of optionally substituted optionally substituted and bicyclic or polycyclic N-containing heteroarylene with one to five nitrogen atoms; and one to five such groups fused or linked, where the Ar group can have one or two substituents that are independently aryl, alkyl or alkoxy having from 1-18 carbon atoms, or two adjacent carbons on the Ar group may be substituted to together form an ethylene dioxy group, wherein when Ar is it is unsubstituted.