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

Abstract

PbBr-based layered perovskite film was successfully prepared by successive deposition of amphiphilic ammonium bromide monolayer which was formed on a subphase of saturated aqueous PbBr 2 solution. In this work, we studied the formation process of layered perovskite structure on the subphase while evaluating reflection spectra of amphiphilic ammonium monolayers and observing topographs of the monolayer using a scanning probe micrograph. The reflection spectra demonstrated that the layered perovskite structure was formed on the subphase of saturated aqueous PbBr 2 solution. From the reflection spectra and the AFM image, the reasonable formation process of the layered perovskite structure on the subphase was proposed.