000K  utf8
1100  $c2025
1500  eng
2050  urn:nbn:de:gbv:8:3-2025-00275-8
2051  10.1038/s41598-024-78259-9
3000  Chowdhury, Subhadip
3010  Bharatiya, B
3010  Bhunia, Satyaban
3010  Giri, Rajendra Prasad
3010  Mukhopadhyay, Mrinmay K
3010  Murphy, Bridget
3010  Sanyal, Milan K
3010  Satpati, Biswarup
3010  Shen, Chen
4000  Investigation on the formation of two dimensional perovskite nanostructures at the water surface through self initiated reaction$hSpringer Science and Business Media LLC  [Chowdhury, Subhadip]
4030  $nSpringer Science and Business Media LLC
4209  The emerging class of hybrid organic-inorganic perovskites (HOIPs) has exhibited fascinating properties for a wide range of technological applications. With halide ions, HOIPs have provided novel optoelectronic devices including efficient solar cells and with pseudohalide anions-like formate (HCOO-), enigmatic electromagnetic properties have been obtained in HOIPs. Large-scale synthesis of such 2D HOIP films is of immense importance for the advancement of its application as solar materials. We have shown using in-situ X-ray measurements that the Langmuir monolayer of perovskite can be formed at the air-water interface by spreading stearic acid molecules on the water subphase having (C4H9NH3)2PbBr4 molecules. The 2D lead formate perovskite films are formed at the air-water interface through a self-initiated reaction and the in-situ X-ray scattering and ex-situ Raman spectroscopy measurements revealed this reaction process. The spreading of lipid molecules having positive and negative head-group charges as surfactants over the water surface shows that the formation of perovskite nanofilms at the air-water interface specifically requires the presence of HCOO- head-group of stearic acid. In this room temperature interfacial reaction, formate anions come from the stearic acid monolayer present on the water surface and completely replace bromines in the perovskite present in water subphase to form (BA)2Pb(HCOO)4 at the air-water interface. Our results show an easy route for large-scale synthesis of 2D pseudohalide perovskites.
4950  https://doi.org/10.1038/s41598-024-78259-9$xR$3Volltext$534
4950  https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2025-00275-8$xR$3Volltext$534
4961  https://macau.uni-kiel.de/receive/macau_mods_00005800
5051  530
5051  530
5550  2D Hybrid Organic-inorganic Perovskite
5550  Langmuir Monolayer
5550  Liquid Surface X-ray Scattering
5550  Surface-initiated Reaction
5550  White Light Photoluminescence