Figure 3.

Additive effects on electron recombination and transport properties for DSCs using optimum electrolytes. (a) Electron lifetimes (τ_η) versus photovoltage (V_oc) and (b) electron diffusion coefficients (D_e) versus the short-circuit photocurrent (J_sc), for PMII-0.02 M I₂-PC electrolyte without additive as well as in the presence of TBP additive and TBP/GuNCS co-additives. (c) Electron lifetimes (τ_η) versus V_oc, and (d) electron diffusion coefficients (D_e) versus J_sc, for PMII-0.08 M I₂-PC electrolytes without additive, with NMBI and with NMBI-GuNCS co-additives.