Enhanced photovoltaic performances of bis(pyrrolo[3,4-c]pyrrole-1,3-dione)-based wide band gap polymer via the incorporation of an appropriate spacer unit between pyrrolo[3,4-c]pyrrole-1,3-dione units
Keywords: Polymer solar cells; Spacer unit effects; Benzodithiophene-based polymers; Pyrrolo[3,4-c]pyrrole-1,3-dione-based polymers; Imide functionalized polymer;