Table 1: Band gap energy for some common semiconductor materials [46].
| Semiconductors | Band Gap Energy (eV) | Semiconductors | Band Gap Energy (eV) |
| Diamond | 5.4 | WO3 | 2.76 |
| SdC | 2.42 | Si | 1.17 |
| ZnS | 3.6 | Ge | 0.744 |
| ZnO | 3.436 | Fe2O3 | 2.3 |
| TiO2 | 3.03 | PbS | 0.286 |
| CdS | 2.582 | PbSe | 0.165 |
| CnS2 | 3.54 | ZrO2 | 3.87 |
| CdSe | 1.7 | Cu2O | 2.172 |