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

Figure 5

(a) Diffuse reflection absorption spectra, (b) the plot calculated by using equation from absorption spectra, and (c) UPS spectra of PbS, Bi-doped-PbS, and Ag-doped-PbS QDs.

(a)

(b)

(c)