Abstract

Perovskite solar cells (PSCs) have attracted major interest from academia and industry due to their high efficiency (up to 25.7%) and their compatibility with several PV applications as Si/perovskite tandem or monofacial and bifacial perovskite modules. A key step to achieve high efficiencies rely upon the control of the deposition of the perovskite film: such polycrystalline film is crystallized in situ starting from a precursor ink, to achieve a uniform and pin-hole free film with a low defect density. Here we will show that is possible to largely enhance the quality of the crystals by including three additives in the perovskite ink that passivate the crystalline defects, enhance the phase purity, and improve the device stability. The approach to achieving stability can follow different pathways: in this talk we will see how the perovskite composition, its passivation with additives, and the addition of compact diffusion barriers can largely extend the lifetime of PSC, making it compatible with accelerated lifetime testing used for conventional PV technologies. Finally, we will discuss the upscaling of this technology by fabricating series-connected modules. With the use of advanced laser processing is possible to structure the films with ultranarrow interconnections to fabricate minimodules with an efficiency of up to 20.7%. [https://meet.goto.com/195067413]