Substrate Temperature (K)

Grain Size from XRD (nm)

TC (002)

Thickness (nm)

Band Gap Energy (eV)

Theoretical Estimation^*

Tauc Plot

723

31.6

1.11

762

3.19

3.16

823

32.2

1.83

759

3.19

3.17

848

28.7

2.84

898

3.19

3.15

873

28.9

1.21

854

3.19

3.2