Co-extruded backsheets based on polypropylene (PP) are an interesting alternative to laminated backsheets containing polyester films (PET). Backsheet cracking has become a frequent failure mode in the last years, causing not only safety issues but on the long term also reducing the lifetime of PV modules. In this work the crack susceptibility of co-extruded backsheets based on PA and PP was investigated using solder bump coupon specimens. The laminated samples were exposed to test sequence of exposure to UV light followed by thermal cycles. Overall, the PP backsheets showed excellent stability and no susceptibility to cracking. By comparison, the PA based backsheets showed next to significant discoloration also strong cracking after a few test cycles.
|Original language||American English|
|Publication status||In preparation - Jun 2022|
|Event||49th IEEE Photovoltaic Specialists Conference - Pennsylvania Convention Center, Philadelphia, United States|
Duration: 5 Jun 2022 → 10 Jun 2022
|Conference||49th IEEE Photovoltaic Specialists Conference|
|Abbreviated title||PVSC 49|
|Period||5/06/22 → 10/06/22|