Investigation of the crack propensity of co-extruded polypropylene based backsheets

Gernot Oreski, Chiara Barretta, Astrid Macher, Gabriele Christine Eder, Lukas Neumaier, Markus Feichtner, Minna Aarnio-Winterhof

Research output: Contribution to conference (No Proceedings)Paperpeer-review


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 languageAmerican English
Publication statusIn preparation - Jun 2022
Event49th IEEE Photovoltaic Specialists Conference - Pennsylvania Convention Center, Philadelphia, United States
Duration: 5 Jun 202210 Jun 2022


Conference49th IEEE Photovoltaic Specialists Conference
Abbreviated titlePVSC 49
Country/TerritoryUnited States
Internet address

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