Research Article
Optimization of Rear Local Al-Contacts on High Efficiency Commercial PERC Solar Cells with Dot and Line Openings
Table 1
Line and dot opening spaces of each area on SC wafers.
| Number | Line opening space (mm) | Dot opening space (mm) |
| 1 | Full Al-BSF | Full Al-BSF | 2 | 0.25 | 0.14 | 3 | 0.33 | 0.16 | 4 | 0.5 | 0.2 | 5 | 1.0 | 0.28 | 6 | 1.43 | 0.33 | 7 | 2.0 | 0.4 | 8 | 3.33 | 0.51 | 9 | No etching | No etching |
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