期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 47, 页码 26012-26016出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b07222
关键词
lead iodide; PbI2; epitaxy; interface; electrodeposition; electrochemical synthesis; methylammonium lead iodide; perovskite
资金
- National Science Foundation [DMR-1104801]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-08ER46518]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1104801] Funding Source: National Science Foundation
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.
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