| abstract |
A conjugated or partially conjugated polymer comprising a structural unit of Formula I in the backbone: n n nwherein Ar 1 , Ar 2 are each independently substituted or unsubstituted aryl or hetero aryl group with two or more aromatic rings fused together and Ar 3 is an aryl or heteroaryl group of C 4 to C 40 or substituted aryl or heteroaryl group of C 4 to C 40 . and devices containing such polymer. In addition, a composition of Formula V n n nwherein Ar 1 , Ar 2 and Ar 3 are aryl or heteroaryl groups and wherein X is a leaving group such as halogen, boronic acid or boronate ester. |