Tailoring a compact and stable Langmuir bi-dimensional PbX-based layered perovskite film at the air–water interface and on solid support

Abstract The present work studies the stability of Langmuir organic–inorganic superlattice materials thin films consisting of layered perovskite-based films with controlled 2D framework as well as to design experimental conditions for increasing the efficiency of the organic–inorganic perovskite motif by mechanical stimulus. Therefore, a whole covering of the air/water interface by a compact and stable lead-based layered perovskite structure is pursued. A 2D layered perovskite-type hybrid structure of the form [(CH 3 (CH 2 ) 19 NH 3 ) 2 (PbX 4 )], X = Cl, and Br, in which, two-dimensional sheets stabilized by a inner bilayer of organic monoammonium cation matrix, is mechanically tailored by successive compression-expansion cycles. The formation of 2D molecular patterns has been characterized by Δ R , BAM, XRD and XPS.