Table 1 The variation of bandgap energy and Urbach’s energy of ZnO thin films
Sample | T s, °C | E g , eV | E u , eV | Sample (anneal) | E g , eV | E u , eV |
|---|---|---|---|---|---|---|
PLD | 20 | 3.30 | 0.14 | PLD an | 3.58 | 0.27 |
PLD-200 | 200 | 3.79 | 0.36 | PLD-200 an | 3.87 | 0.32 |
PLD-300 | 300 | 4.08 | 0.18 | PLD-300 an | 3.83 | 0.12 |
PLD-400 | 400 | 4.19 | 0.28 | PLD-400 an | 3.98 | 0.28 |