A study conducted by researchers of the Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", which highlighted how the use of additives capable of forming a halogen bond with the halide ions present in perovskites, brings significant advantages for the development of solar cells with better crystallinity and greater stability has been published in «Angewandte Chemie». The halogen bond in fact allows the introduction of fluorinated molecules which passivate the surface halides allowing to obtain hydrophobic and water-repellent perovskites. In this way, the trap states are blocked with a consequent increase in efficiency. 

Halogen Bonding in Perovskite Solar Cells: A New Tool for Improving Solar Energy Conversion

Pierangelo Metrangolo, Laura Canil, Antonio Abate, Giancarlo Terraneo and Gabriella Cavallo

Angew.Chem.Int. Ed.2022, 61, e202114793

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