Figure 1
Structure and optical properties of mixed dimensional perovskites: (a) schematic illustration of (NMA)2(MA)n−1PbnI3n+1 perovskite structures with different stoichiometry, where n = 1 corresponds to pure 2D and n = ∞ to 3D perovskites; (b) absorption spectra of n = ∞, dimensionally controlled (n = 60, 40), and 2D (NMA)2PbI4 (n = 1) perovskites; (c) photoluminescence spectra of the corresponding perovskite films (n = 1, 60, 40 and ∞) deposited on glass. The n values of mixed dimensional perovskite are based on the composition of precursor solution, calculated by using (NMA)2(MA)n−1PbnI3n+1 stoichiometry.
