Table 5 The computed optical band gap energies (Eg in eV) by three methods.
Eg in eV | Absorption cut-off | Direct Tauc | Indirect Tauc | Aver. Values | ||||
|---|---|---|---|---|---|---|---|---|
ZnO | CuO | ZnO | CuO | ZnO | CuO | ZnO | CuO | |
ZnO(Nd)/CuO | 2.503 | 1.535 | 2.911 | 1.579 | 2.062 | 1.539 | 2.492 | 1.551 |
CuO(Nd)/ZnO | 3.188 | 1.464 | 3.194 | 1.529 | 3.119 | 1.473 | 3.167 | 1.489 |
