Position-locking of volatile reaction products by atmosphere and capping layers slows down photodecomposition of methylammonium lead triiodide perovskite
Fengshuo Zu, Thorsten Schultz, Christian M. Wolff, Dongguen Shin, Lennart Frohloff, Dieter Neher, Patrick Amsalem, Norbert Koch
Abstract
, leading to volatile methylammonium and iodine, is largely reversible as long as these products are restrained from leaving the surface. This is readily achieved by ambient atmospheric pressure, as well as a thin organic capping layer even under ultrahigh vacuum. In addition to explaining the impact of gas pressure on the stability of this perovskite, our results indicate that covalently "locking" the position of perovskite components at the surface or an interface should enhance the overall photostability.
Topics & Concepts
TriiodidePerovskite (structure)HalideX-ray photoelectron spectroscopyMetalChemistryPhotovoltaicsPhotochemistryMaterials scienceChemical engineeringInorganic chemistryElectrodePhotovoltaic systemOrganic chemistryElectrolytePhysical chemistryEngineeringEcologyDye-sensitized solar cellBiologyPerovskite Materials and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films