Polymer, its preparation and uses

摘要

A polymer comprising a first repeat unit comprising Ar?h¿X¿2? wherein Ar?h¿ comprises a substituted or unsubstituted heteroaryl group and each X is the same or different and independently comprises a substituted or unsubstituted aryl or heteroaryl group and a second repeat unit that is adjacent to the first repeat unit wherein each X that is part of a main body of the polymer backbone is directly conjugated to the second repeat unit.