摘要： ZW003, has been synthesized and applied in dye-sensitized solar cells (DSSCs). Both dyes have broad absorption and large molar absorption coefficients. The sensitizer with the HQ core effectively restrains intermolecular aggregation owing to steric hindrance of numerous alkyl chains. A thienyl unit with or without a hexyl branch is used as a π-bridge. Incorporation of only thienyl groups as a π-bridge into the sensitizer increases the dye-loading amount on TiO2 film owing to the smaller molecular size. Using the ZW002 dye with the Co (II/III) redox couple results in DSSCs that exhibits a high photovoltaic conversion efficiency of 8.23% and short-circuit current density (Jsc) of 12.43 mA cm?2, an open-circuit voltage (Voc) of 960 mV, and a fill factor (FF) of 0.69. Although ZW003 shows a wider absorption range than that of ZW002, the two additional phenyl groups on the quinoxaline unit contributes to poorer performance (PCE of 7.43%) due to more serious dye aggregation.