Aluminum-Doped SnO₂ Hollow Microspheres as Photoanode Materials for Dye-Sensitized Solar Cells

Figure 3

XPS of SnO₂ hollow microspheres doped with 1.5% Al and pure SnO₂ hollow microspheres (given in the insert): (a) full spectra; (b) high resolution of O 1s; (c) high resolution of Sn 3d; (d) high resolution of Al 2p.

(a)

(b)

(c)

(d)