Layer-by-Layer CdS-Modified TiO₂ Film Electrodes for Enhancing the Absorption and Energy Conversion Efficiency of Solar Cells

Figure 3

UV-vis absorption spectra of bare TiO₂ nanocrystalline film, TiO₂(𝑛)-CdS(𝑛) (𝑛=1–5) and TiO₂(OS)-CdS electrodes. Photographs of bare TiO₂ and TiO₂(𝑛)-CdS(𝑛) (𝑛=1–5), electrodes were presented in turn as inset.