Perovskite Thin Film Materials Stabilized and Enhanced by Zinc(II) Doping

Featured Application Doping lead perovskite materials with a few percent of zinc-halides increases their stability at ambient conditions, enhances their properties and improves the efficiency of the corresponding solar cell devices. Abstract Recent work of ten different groups shows that the application of zinc-halides in lead perovskite materials results in a contraction of the d-space, stronger interaction with the organic cation, improved crystallization with larger crystal domains, a Goldschmidt factor closer to unity, smoother and denser thin films and an even distribution of Zn(II) (at the Pb(II) sites) throughout the material. These combined effects may lead to: (1) a substantially higher stability (even at ambient or high humidity conditions); (2) enhanced luminescent properties; (3) a higher power conversion efficiency (PCE) of the corresponding solar cell devices (up to PCE similar to 20%, with enhancement factors of 1.07 to 1.33 relative to undoped material).