May 7, 2021, C. Stubbs
Notes on making electrical connection to solar cells.
We have found that directly soldering to C60 solar cell tabs reduces the shunt resistance, presumably due to migration of impurities or dopants in the material. We're therefore experimenting with various conductive epoxies.
Some of these require curing at temperatures above room temperature. For the copper bars with three pads, when glued onto the cell, when placed in an oven at 70C for 30 minutes, we found that the differential thermal expansion cracked the cell.
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Solar Cell dispositions
| Cell | Generation (2 or 3) | measured series resistance | status and notes |
|---|---|---|---|