title: Electrodeposition of Epitaxial Lead Iodide and Conversion to Textured Methylammonium Lead Iodide Perovskite.
abstract: Applications for lead iodide, such as lasing, luminescence, radiation detection, and as a precursor for methylammonium lead iodide perovskite photovoltaic cells, require highly ordered crystalline thin films. Here, an electrochemical synthesis route is introduced that yields textured and epitaxial films of lead iodide at room temperature by reducing molecular iodine to iodide ions in the presence of lead ions. Lead iodide grows with a [0001] fiber texture on polycrystalline substrates such as fluorine-doped tin oxide. On single-crystal Au(100), Au(111), and Au(110) the out-of-plane orientation of lead iodide is also [0001], but the in-plane orientation is controlled by the single-crystal substrate. The epitaxial lead iodide on single-crystal gold is converted to textured methylammonium lead iodide perovskite with a preferred [110] orientation via methylammonium iodide vapor-assisted chemical transformation of the solid.
authors.affiliation: Department of Chemistry and Graduate Center for Materials Research, Missouri University of Science and Technology , Rolla, Missouri 65409-1170, United States.
authors.forename: James C
authors.initials: JC
authors.lastname: Hill
authors.affiliation: Department of Chemistry and Graduate Center for Materials Research, Missouri University of Science and Technology , Rolla, Missouri 65409-1170, United States.
authors.forename: Jakub A
authors.initials: JA
authors.lastname: Koza
authors.affiliation: Department of Chemistry and Graduate Center for Materials Research, Missouri University of Science and Technology , Rolla, Missouri 65409-1170, United States.
authors.forename: Jay A
authors.initials: JA
authors.lastname: Switzer
keywords: PbI2; electrochemical synthesis; electrodeposition; epitaxy; interface; lead iodide; methylammonium lead iodide; perovskite