Effect of Sequential and Combined Space‐Based Stressors on Perovskite Solar Cell Stability

This work reports on the effect of individual and sequential space‐based stressors on the stability of perovskite solar cells (PSCs). Specifically, Low Earth Orbit (LEO) conditions are simulated, incorporating proton ( p + ) irradiation, light soaking, and thermal cycling. Upon exposure to stressors sequentially, PSCs show a tolerance to p + irradiation, a healing with light soaking, and a slight degradation due to thermal cycling, as validated by the changes in power conversion efficiency (PCE), mobile ion behavior, and structural changes of the perovskite layer. We observe an anti‐correlation between mobile ion concentration ( N o ) and PCE, where a decrease in PCE leads to an increase in N o and vice versa. We showcase the role of the hole transport layer (HTL) configuration on the stability of PSCs under combined space‐based stressors through temperature and light cycling of PSCs in simulated LEO conditions. We observe improvement in the performance of the bilayer HTL PSC up to 5 orbital cycles and demonstrate stability of the bilayer HTL PSC when held at temperature extremes of LEO, both in terms of performance and N o .