Co-sensitization of N719 with polyphenylenes from the Bergman cyclization of maleimide-based enediynes for dye-sensitized solar cells

N719 co-sensitized with a conjugated polyphenylene (7-BC) shows a high efficiency of 9.68% (V_OC of 750 mV, J_SC of 18.18 mA cm⁻² and FF of 0.71) in dye-sensitized solar cells, exhibiting an improvement of 16% compared to devices sensitized with N719 (PCE of 8.34%) alone.