Strategies for the Analysis of Perovskite Solar Cells under Outdoor (ISOS-O) Conditions
Monica Lira-Cantu a
a Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Edifici ICN2, Av. de Serragalliners, s/n, Bellaterra, Spain
Proceedings of Workshop on Stable Hybrid Perovskite Materials for Photovoltaics Under Real-World Conditions (StabPeroWorkshop)
Fribourg, Switzerland, 2023 February 23rd - 23rd
Organizers: Jovana Milic and Daniel Ramirez
Invited Speaker, Monica Lira-Cantu, presentation 007
Publication date: 20th January 2023

Perovskite solar cells (PSCs) are one of the most efficient and cost-effective PV technologies with efficiencies reaching the 26 % mark. They have attracted substantial interest due to their light-harvesting capacity combined with low-cost manufacturing. However, unsolved questions of perovskite stability are still a concern, challenging their potential of widespread commercialization. Factors able to induce degradation to metal halide perovskite (MOHP) materials and devices, such as humidity, atmosphere, bias voltage, temperature, or light exposure, have been the centre of multiple studies and debates for many years. The ISOS stability assessment protocols, elaborated after a consensus among leading international laboratories, have been recently upgraded to incorporate stressors involving the peculiarities of PSCs. However, the understanding of the different degradation mechanisms taking place in materials and solar cells will only be effective if the applied stressors are as closed as possible to an actual functioning solar cell under real (outdoor) conditions. The application of real outdoor conditions (ISOS-O protocol) implies that multiple stressors are imposed to the sample with large variability and with different dosages. In this talk, I will show our most recent publications related to the issues observed for the analysis of PSCs under outdoor stability analysis (e.g. encapsulation). I will also show our most recent results on the interface and bulk modification of PSCs with the aim of enhancing device stability (indoor and outdoor), in this case our work is focus on the use of organic additives and MXenes. Finally, I will briefly describe our current work on in-situ and operando characterization, under single or multiple stressors with time, on PSCs to elucidate degradation mechanisms in these devices.

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