Potential, Radiation Tolerance and Damage Mechanisms of Perovskite Multijunction-Based Space PV

In this presentation, I will review lessons learned during various high-energy proton irradiation experiments we conducted on perovskite single-junctions, as well asperovskite/Silicon, perovskite/CIGS, and perovskite/perovskite tandem PV. With perovskite subcells being highly radiation tolerant perovskite/perovskite tandems, even exceed commercially available, industry-standard III-V semiconductors on Ge triple-junction space solar cells in terms of radiation tolerance. To enable a deeper understanding of potential degradation mechanisms, I will present various subcell-specific characterization techniques that allow disentangling of the different losses and limiting factors in monolithic interconnected perovskite-based multijunction solar cells. Contrary to standardJVcharacterizations, this approach allows us to assess the performance and loss mechanisms of the individual subcells, even after their assembly in a monolithic tandem stack. I will begin with subcell-specific characterizations after high energetic irradiation mimicking the harsh radiation environment in space and then continue with various examples in which we identify limiting loss mechanisms and efficiencypotentials in perovskite/silicon and perovskite/perovskite tandems. After all, such deep understanding is pivotal to further optimizing the efficiency as well as the stability for space applications.