Summary of the band-gaps of NbSe2 and Nb2Se9 when varying the selenium precursors.
| Selenium precursor | NbSe2Eg | Nb2Se9Eg |
|---|---|---|
| Se | 3.29 eV | 2.43 eV |
| SeO2 | 2.91 eV | 2.44 eV |
| SU | 2.55 eV | 2.12 eV |
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