Air-Processable Perovskite Solar Cells by Hexamine Molecule Phase Stabilization

Perovskite solar cells have emerged as a potential energyalternativedue to their low cost of fabrication and high power conversion efficiency.Unfortunately, their poor ambient stability has critically limitedtheir industrialization and application in real environmental conditions.Here, we show that by introducing hexamine molecules into the perovskitelattice, we can enhance the photoactive phase stability, enablinghigh-performance and air-processable perovskite solar cells. The unencapsulatedand freshly prepared perovskite solar cells produce a power conversionefficiency of 16.83% under a 100 mW cm(-2) 1.5G solarlight simulator and demonstrate high stability properties when beingstored for more than 1500 h in humid air with relative humidity rangingfrom 65 to 90%. We envisage that our findings may revolutionize perovskitesolar cell research, pushing the performance and stability to thelimit and bringing the perovskite solar cells toward industrialization.

Automated summary

By introducing hexamine molecules into the perovskite lattice, the photoactive phase stability of perovskite solar cells can be enhanced, resulting in high-performance and air-processable cells. The unencapsulated and freshly prepared cells demonstrate a power conversion efficiency of 16.83% under a 100 mW cm(-2) 1.5G solar light simulator and exhibit high stability properties after being stored for more than 1500 h in humid air.