Three branched poly (thienylene vinylene) s, ie, poly (thienylene vinylene) derivatives with bi (thienylene vinylene) side chains (biTV-PTVs), biTV-PTV1-3, were synthesized for obtaining the conjugated polymers with broad and strong visible absorption spectra. The polymers were characterized by thermogravimetric analysis (TGA), absorption spectroscopy, cyclic voltammetry, in situ spectroelectrochemical and photovoltaic measurements, and ...