Journal Article

PUBDB-2025-01676

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Investigation on the formation of two dimensional perovskite nanostructures at the water surface through self initiated reaction

Chowdhury, S.Extern* ; Mukhopadhyay, M. K. (Corresponding author)Extern* ; Sanyal, M. (Corresponding author)Extern* ; Bhunia, S. ; Satpati, B. ; Giri, R. P.Extern* ; Bharatiya, B.Extern* ; Shen, C.Extern*DESY* ; Murphy, B. M.Extern*XFEL.EU*DESY*

2025
Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41598-024-78259-9  doi:10.3204/PUBDB-2025-01676

Abstract: The emerging class of hybrid organic-inorganic perovskites (HOIPs) has exhibited fascinating properties for a wide range of technological applications. With halide ions, HOIPs have provided novel optoelectronic devices including efficient solar cells and with pseudohalide anions-like formate (HCOO$^−$), enigmatic electromagnetic properties have been obtained in HOIPs. Large-scale synthesis of such 2D HOIP films is of immense importance for the advancement of its application as solar materials. We have shown using in-situ X-ray measurements that the Langmuir monolayer of perovskite can be formed at the air-water interface by spreading stearic acid molecules on the water subphase having (C$_4$H$_9$NH$_3$)$_2$PbBr$_4$ molecules. The 2D lead formate perovskite films are formed at the air-water interface through a self-initiated reaction and the in-situ X-ray scattering and ex-situ Raman spectroscopy measurements revealed this reaction process. The spreading of lipid molecules having positive and negative head-group charges as surfactants over the water surface shows that the formation of perovskite nanofilms at the air-water interface specifically requires the presence of HCOO$^−$ head-group of stearic acid. In this room temperature interfacial reaction, formate anions come from the stearic acid monolayer present on the water surface and completely replace bromines in the perovskite present in water subphase to form (BA)$_2$Pb(HCOO)$_4$ at the air-water interface. Our results show an easy route for large-scale synthesis of 2D pseudohalide perovskites.

Note: BMBF/05K16FK1/05K19FK2/ 05K21FK3 research grants for financing the LISA instrument

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. INDIA-DESY - INDIA-DESY Collaboration (2020_Join2-INDIA-DESY) (2020_Join2-INDIA-DESY)

Experiment(s):

1. PETRA Beamline P08 (PETRA III)

Appears in the scientific report 2025

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