Heterovalent Cation Substitutional and Interstitial Doping in Semiconductor Sensitizers for Quantum Dot Cosensitized Solar Cell

Figure 7

(a) Diffuse reflection absorption spectra of photoanode, (b) - curves, (c) IPCE spectra, and (d) EIS spectra of TiO₂/PbS(2)/CdS(7), TiO₂/Bi-doped-PbS(2)/CdS(7), TiO₂/PbS(2)/CdS(6), and TiO₂/Ag-doped-PbS(2)/CdS QDCSCs.

(a)

(b)

(c)

(d)