PbBr-based layered perovskite film using the Langmuir–Blodgett technique

Formation of Layered Perovskite Structure by Folding Monolayer During Compression

“…This value is close to the layer spacing of the corresponding multilayered LB film evaluated by X-ray diffraction. 13 The higher flat-topped region at the surface area of 0.20 nm 2 molecule −1 was larger in area than that at 0.25 nm 2 molecule −1 . This indicates an increase in the region of formed perovskite by compression in a plateau region, which agrees with an enlargement of reflection peak due to formation of organic-inorganic layered perovskite.…”

“…Owing to the low-dimensional semiconductor structure, they form a stable exciton with a large binding energy and exhibit attractive optical characteristics due to the stable exciton such as efficient photoluminescence, electroluminescence and optical nonlinearity. [4][5][6][7][8][9][10][11][12] It has been reported [13][14][15] that ultrathin films of the lead bromide-based layered perovskite can be prepared by the Langmuir-Blodgett method. One of these reports speculated the formation mechanism of perovskite structure using reflection spectra of monolayer on the water surface and an atomic force microscope (AFM) image of transferred film.…”

Formation of lead bromide-based layered perovskite monolayer having organic–inorganic quantum-well structure at air–water interface

“…In our previous work, we succeeded in preparing thin films of the lead bromide-based layered perovskite by using the Langmuir -Blodgett technique [4,5]. Monolayer of docosylammonium bromide (C 22 H 45 NH 3 Br) was spread on a saturated aqueous solution of PbBr 2 .…”

Perovskite Photovoltaics: Rare Functions of Organo Lead Halide in Solar Cells and Optoelectronic Devices

“…1a Before our trial, hybridstructured perovskite materials had been intensively studied in the 1990s by Mitzi et al, 2 Ema et al, 3 and Kondo et al 4 for the physics of two-dimensional (2D) and three-dimensional (3D) crystals. 2D thin-layered structures as studied by Era et al 5 and Takeoka et al 6 had strong quantum confinement effects to enhance luminescence. However, 3D crystals made of small organic groups were less attractive for use in electro-optics.…”