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Average crystallite size (D), bandgap energy (Eg) and grain boundary specific area (Sa) w.r.t. to annealing temperatures.
| Annealing Temp (°C) | D (nm) | Sa (m2·m−3) | Eg (eV) |
|---|---|---|---|
| 300 | 36.20 | 4.455 × 107 | 3.26 |
| 600 | 38.81 | 4.251 × 107 | 3.25 |
| 900 | 43.42 | 3.800 × 107 | 3.36 |
