Effect of metal-doping in TiO_2 on fill factor of dye-sensitized solar cells

摘要

In the study of dye-sensitized solar cells (DSSCs), we find that fill factor (FF) increases with the doping amount of Zn(II) but decreases with the doping amount of W(VI) in TiO_2 A single-diode model is established to analyze the dependence of FF on open-circuit voltage (Voc) and ideal factor (m). This model well explains the changes of FF caused by the doping element and amount, that is, FF increases with the ratio of V_(oc)/m. This study will shed light on the influencing factors of FF and guide the design of new materials towards high FF for DSSCs.