Publication date: 17th February 2025
Outdoor stability testing under natural sunlight provides the most relevant test of solar cell stability under operational conditions [1]. Understanding perovskite-based solar cells’ recovery properties under natural diurnal light-dark cycling can point to methods to extend its lifetime [2, 3]. We systematically studied various aspects of such testing including: (i) the effect of climate conditions on perovskite solar cell lifetime, which showed that outdoor T80 is climate dependent with the ambient temperature being the dominant factor [4]; (ii) the effect of perovskite solar cell architecture and component materials on outdoor lifetimes, showing that the perovskite material degradation is NOT the determining factor; (iii) optimized cell encapsulation in terms of the cell lifetime, showing preference for encapsulation schemes with Al2O3 thin films and glass-on-glass with butyl rubber-based sealant compared to other studied encapsulations; and (iv) prediction of the outdoor degradation behavior from accelerated indoor stability analyses enabled by machine learning algorithms and mathematical decompositions, which can be used to determine the most relevant stress factors affecting outdoor stability [5].
The authors acknowledge funding from the project ProperPhotoMile, supported under the umbrella of SOLAR-ERA.NET Cofund 2 by The Spanish Ministry of Science and Education and the AEI under project PCI2020-112185 and CDTI project number IDI-20210171; the Federal Ministry for Economic Affairs and Energy on the basis of a decision by the German Bundestag project number FKZ 03EE1070B and FKZ 03EE1070A; and the Israel Ministry of Energy with project number 220-11-031. SOLAR-ERA.NET is supported by the European Commission within the EU Framework Programme for Research and Innovation HORIZON 2020 (Cofund ERA-NET Action, N◦ 786483). Support by the Israel Science Foundation grant #2457/23, the Israel's Ministry of Energy and Infrastructures grant #3-19074/ 222-11-081 and grant # 3-18108/ 221-11-053 is also acknowledged.
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