The addition of a hydrazide facilitates film formation and fosters stability of tandem solar cells
Entirely inorganic perovskites are a promising alternative to traditional perovskite solar cells, which present bottlenecks in terms of efficiency and stability. However, inorganic salts face fabrication and scalability issues. Now, a simple stabilising ligand allows all-inorganic perovskite cells with an efficiency of up to 22%, surpassing previous records and paving the way towards scalable solar cells.