Superior Photocurrent of Quantum Dot Sensitized Solar Cells Based on PbS : In/CdS Quantum Dots

Figure 8

(a) Diffusion reflectance absorbance spectra of semiconductor films deposited on mesoporous TiO₂ films: PbS/CdS (■), PbS : In/CdS (★). (b) IPCE spectra for PbS/CdS (■), PbS : In/CdS (★). (c) - characteristics of different working electrodes measured under AM 1.5 global filter of 100 mW cm⁻² sunlight: undoped PbS/CdS (■), PbS : In/CdS (★). (d) Impedance measurement of QDSCs: undoped PbS/CdS (■), PbS : In/CdS (▲) at an applied negative bias, = −0.4 V, under dark conditions. The working electrodes areas were both at 0.09 cm².

(a)

(b)

(c)

(d)