| Annealing Temperature (˚C) | thickness (nm) | crystallite size (Å) | |
| ITO Substrates | FTO Substrates | ||
| 300 | 300 | 66.1 | 45.3 |
| 500 | 79.8 | 55.2 | |
| 600 | 82.1 | 61.6 | |
| 400 | 300 | 102.4 | 96.1 |
| 500 | 145.8 | 114.9 | |
| 600 | 151.2 | 122.4 | |