Polymer semiconductor materials opened up one of the most hopeful prospects for large-area flexible electronic devices due to their low fabrication cost, lightweight and mechanical flexibility.Except for the electron-rich and electron-deficient units, both the linker effect in the backbone and the substitutional position of the alkyl chains can affect polymer properties. In the project, a series of alternate donor-acceptor conjugated polymers based on benzothiadiazole unit were carried out to study the infl...