Table 2.
Band gaps of SnO2 films from the samples shown in Figure 8, estimated from diffuse reflectance spectra.
| SnO2 Films (Nanoparticles Synthesis/Heat Treatment) | Bandgap (eV) |
|---|---|
| 100 °C reaction, Annealing at 120 °C only | 3.86 |
| 110 °C reaction, Annealing at 120 °C only | 3.85 |
| 100 °C reaction, Sintering at 400 °C without TTIP | 3.86 |
| 100 °C reaction, Sintering at 500 °C without TTIP | 3.85 |
| 110 °C reaction, Sintering at 400 °C without TTIP | 3.87 |
| 110 °C reaction, Sintering at 500 °C without TTIP | 3.86 |
| 100 °C reaction, Sintering at 400 °C with TTIP | 3.60 |
| 100 °C reaction, Sintering at 500 °C with TTIP | 3.53 |
| 110 °C reaction, Sintering at 400 °C with TTIP | 3.60 |
| 110 °C reaction, Sintering at 500 °C with TTIP | 3.57 |