Table 2. Comparison of exciton binding energies |Eb| and GW band gaps.
| MoS2 | hBN | Si(111) | |
|---|---|---|---|
| Binding energy | |||
| Present | 0.44 | 1.90 | 0.20 |
| Ab initio | 0.1522, 0.434, 0.6525 | 1.832, 2.054, 2.120 | 0.2618 |
| GW and TB gaps | |||
| Present | 2.42 | 8.00 | 0.66 |
| Ab initio | 2.4833, 2.725 | 7.932, 7.420 | 0.6217, 0.6918 |
All values are in eV. Note, only exciton binding energies are actually calculated in the present work. Appropriate TB band gaps are ensured by using TB parameters which ensure agreement between experimental and theoretical exciton features. Superscripts indicate references.