179289.fig.005a
(a)
179289.fig.005b
(b)
Figure 5: (a) IPCE spectra for four devices; (b) EIS spectra of QDSSCs measured in the dark at −0.4 V bias voltages. The inset illustrates the equivalent circuit simulated. Rrec and CPE1 represent the charge transfer resistance and capacitance at TiO2/electrolyte interface, respectively; is a series resistance.