S. No. | Temperature (˚C) | Time (Hours) | Transmittance (% T) | Band Gap (eV) |
1. | 300 (glass) | 2 | 74 | 3.91 |
2. | 350 (glass) | 2 | 70 | 3.73 |
3. | 300 (quartz) | 4 | 83 | 3.56 |
4. | 500 (quartz) | 4 | 80 | 3.41 |
5. | 700 (quartz) | 4 | 71 | 3.66 |