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

Ali, Azmat (author)
Sorbonne Université, CNRS, Institut des Nanosciences de Paris, INSP, F-75005, Paris, France
Cruguel, Herve (author)
Sorbonne Université, CNRS, Institut des Nanosciences de Paris, INSP, F-75005, Paris, France
Giangrisostomi, Erika (author)
Institute Methods and Instrumentation for Synchrotron Radiation Research PS-ISRR, Helmholtz Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489, Berlin, Germany
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Ovsyannikov, Ruslan (author)
Institute Methods and Instrumentation for Synchrotron Radiation Research PS-ISRR, Helmholtz Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489, Berlin, Germany
Silly, Mathieu G. (author)
Synchrotron SOLEIL, l‘Orme des Merisiers, Saint-Aubin, Boîte Postale 48, 9119, Gif-sur-Yvette Cedex, France
Dudy, Lenart (author)
Synchrotron SOLEIL, l‘Orme des Merisiers, Saint-Aubin, Boîte Postale 48, 9119, Gif-sur-Yvette Cedex, France
Cappel, Ute B. (author)
Division of Applied Physical Chemistry, Department of Chemistry, KTH − Royal Institute of Technology, SE-100 44 Stockholm, Sweden
Lhuillier, Emmanuel (author)
Sorbonne Université, CNRS, Institut des Nanosciences de Paris, INSP, F-75005, Paris, France
Witkowski, Nadine (author)
Sorbonne Université, CNRS, Institut des Nanosciences de Paris, INSP, F-75005, Paris, France
Johansson, Fredrik (author)
Sorbonne Université, CNRS, Institut des Nanosciences de Paris, INSP, F-75005, Paris, France;Division of Applied Physical Chemistry, Department of Chemistry, KTH − Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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 (creator_code:org_t)
American Chemical Society (ACS), 2024
2024
English.
In: The Journal of Physical Chemistry Letters. - : American Chemical Society (ACS). - 1948-7185. ; 15:14, s. 3721-3727
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  • Journal article (peer-reviewed)
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  • 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 (Pbint) was identified in the Pb 4f XPS spectra after exposure to high intensity X-rays or UV light. The Pbint 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+.

Subject headings

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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