Impact of Epoxy Encapsulation on Device Stability of Large- Area Laser-Patterned Perovskite Solar Cells

Organic-inorganic perovskite solar cells have achieved power conversion efficiencies that rival the established mainstream photovoltaic technologies, however, the lack of longterm stability presents one major hurdle for their commercialization. Here, we investigate the impact of low-cost epoxy encapsulation on device stability of large-area, laser-patterned perovskite solar cells and mini-modules, yielding results relevant to large modules for commercial applications. We track the performance evolution of our devices stored under different conditions. On this basis, we employ light-beam induced current (LBIC) to spatially resolve the photocurrent degradation of these devices, showing the striking contrast between devices with and without encapsulation after three months (~ 2000 hours) of storage under ambient and humid conditions.