| Autor: |
Lehr, Martin, Heinemeyer, Frank, Eidelloth, Stefan, Brendemühl, Till, Kiefer, Fabian, Münster, Daniel, Lohse, Anja, Berger, Miriam, Braun, Nadja, Brendel, Rolf |
| Jazyk: |
angličtina |
| Předmět: |
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| Popis: |
We investigate process sequences for obtaining solderable Al/Ni:V/Ag contacts to PERC-type crystalline Si solar cells by in-line Al evaporation. For a high cell efficiency the evaporated aluminum must be annealed at 350 °C for about 5 min. We find that annealing the Al/Ni:V/Ag metallization stack at temperatures above 150 °C destroys the solderability of the wetting layer. A solution for this problem is to first deposit the 2.5 μm Al layer by evaporation, then anneal the cell at 350 °C for 10 min, and finally sputter a double layer of Ni:V/Ag with respective thickness values of 200 nm and 25 nm. This process leads to a contact resistivity lower than 1 mΩcm2. The solderablility is proven by a peel force greater than 3 N/mm. We present a solderable PERC cell with Al/Ni:V/Ag rear side metallization and an efficiency of 18.9%. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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