Performance Constraints of All‐Perovskite Tandem Solar Cells in Low‐Intensity, Low‐Temperature Environments (Adv. Mater. 15/2026)

All-Perovskite Tandem Solar Cells All-perovskite tandem solar cells promise exceptional power-to-weight ratios for space photovoltaics, yet their operation under low-intensity, low-temperature conditions remains poorly understood. This work reveals distinct loss regimes that emerge below room temperature. Weaker entropic mixing below ≈240 K leads to accelerated halide segregation, inducing current mismatch and fill factor loss, while C60 transport limitations dominate at cryogenic temperatures. More details can be found in the Research Article by Felix Lang and co-workers (DOI: 10.1002/adma.202517703). Background image: Courtesy NASA.