Research Article
All-Vacuum-Deposited Bifacial Cu2ZnSnSe4 Photovoltaic Cells with Sputtered Cd-Free Buffer Layer
Figure 5
Changes in (a) reflectance and transmittance, (b) absorptance, (c) (αhν)2 vs. hν in CZTSe thin film, and (d) optical bandgap of CZTSe thin film with different numbers of metal precursor layers.
| (a) |
| (b) |
| (c) |
| (d) |