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