High-pressure structural evolution of 2D metal-halide perovskites: influcence of long-chain organic cations

The goal of this proposal is to characterize the structural evolution as a function of pressure at room temperature of three different 2D metal halide perovskites of general formula A2PbBr4 containing three different linear amines on the A-site of the structure characterized by increasing chain length, namely hexylammonium (C6), decylammonium (C10) and hexadecylammonium (C16). The structural study will be coupled to the spectroscopic measurements as a function of pressure, such as absorbance and photoluminescence, to fully characterize the behaviour of these low dimensional hybrid perovskites upon compression and unveil the role of organic spacer length on structural stability and optical properties.