Table 4. Urbach and energy bandgap values for as-deposited CdS.
| Sample | Film thickness (nm) | Urbach energy (meV) | Bandgap (eV) |
|---|---|---|---|
| CdS-0 | 92.30 | 174.83 | 2.44 |
| CdS-1 | 96.02 | 168.07 | 2.44 |
| CdS-2 | 100.51 | 115.88 | 2.45 |
| CdS-3 | 89.32 | 331.13 | 2.45 |
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