Effects of Surface Modification of TiO₂ Nanotube Arrays on the Performance of CdS Quantum-Dot-Sensitized Solar Cells

Figure 5

(a) UV-vis absorption spectra of TiO₂ nanotube arrays and CdS/TNAs with different modifications. Linear extrapolation is conducted to get absorption edges of (b) CdS particles, (c) CdS/TiO₂, and (d) CdS/TiO₂ treated with HNO₃ and (e) CdS/TiO₂ treated with MTMS.

(a)

(b)

(c)

(d)

(e)