The Electronic Impact of Light-Induced Degradation in CsPbBr₃ Perovskite Nanocrystals at Gold Interfaces.

ABSTRACT: The understanding of the interfacial properties in perovskite devices under irradiation is crucial for their engineering. In this study we show how the electronic structure of the interface between CsPbBr₃ perovskite nanocrystals (PNCs) and Au is affected by irradiation of X-rays, near-infrared (NIR), and ultraviolet (UV) light. The effects of X-ray and light exposure could be differentiated by employing low-dose X-ray photoelectron spectroscopy (XPS). Apart from the common degradation product of metallic lead (Pb⁰), a new intermediate component (Pb^int) was identified in the Pb 4f XPS spectra after exposure to high intensity X-rays or UV light. The Pb^int component is determined to be monolayer metallic Pb on-top of the Au substrate from underpotential deposition (UPD) of Pb induced from the breaking of the perovskite structure allowing for migration of Pb²⁺.

SUBMITTER: Ali A 

PROVIDER: S-EPMC11017319 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature