PT Journal
AU Chowdhury, S
   Mukhopadhyay, MK
   Sanyal, MK
   Bhunia, S
   Satpati, B
   Giri, RP
   Bharatiya, B
   Shen, C
   Murphy, B
TI Investigation on the formation of two dimensional perovskite nanostructures at the water surface through self initiated reaction
SO Scientific reports
JI Sci Rep
PY 2025
BP 6216
VL 15
IS 1
PU Springer Science and Business Media LLC
DI 10.1038/s41598-024-78259-9
WP https://macau.uni-kiel.de/receive/macau_mods_00005800
LA en
DE Langmuir Monolayer; Liquid Surface X-ray Scattering; White Light Photoluminescence; 2D Hybrid Organic-inorganic Perovskite; Surface-initiated Reaction
SN 2045-2322
AB 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 (C4H9NH3)2PbBr4 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)2Pb(HCOO)4 at the air-water interface. Our results show an easy route for large-scale synthesis of 2D pseudohalide perovskites.
PI [London]; London
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