Absorber, solar cell and process for producing an absorber

Abstract

An absorber for a solar cell that has an empirical formula (Cs,AZ)Pbl3, (Cs,AZ)Pb(l, Br)3, (Cs,AZ)Pb(l, Cl)3 or (Cs,AZ)Pb(l, Br, Cl)3 and a perovskite structure, where AZ represents azetidinium. The invention further relates to a solar cell including the absorber. The invention further relates to a process for producing the absorber, comprising: a) providing a substrate, b) thermally evaporating Csl and/or CsBr and/or CsCl to form a first vapor jet produced from a first evaporation source, c) thermally evaporating Pbl2 and/or PbBr2 and/or PbCl2 to form a second vapor jet produced from a second evaporation source, d) thermally evaporating AZI with AZI=azetidine hydroiodide or azetidinium iodide to form a third vapor jet which is produced from a third evaporation source, where steps b), c) and d) are performed simultaneously such that the first, second and third vapor jets overlap, such that the absorber is formed on the substrate.

Dependencies are inferred from the claim text.