Luminescent Macroporous Aerogels of Two-Dimensional Nanocrystals of Metal Halide Perovskites with Adjustable Semiconducting Bandgaps

Abstract

In semiconducting aerogels, exciton-photon interactions occur in porous frameworks with solid-gas interfaces. Herein, by freezing and vacuum freeze-drying of cyclohexane dispersions of platelet-shaped nanocrystals of organic-inorganic metal halide perovskites, aerogels with macro-/meso-porosity, tunable luminescence in the visible light range, and photocurrent responses were fabricated.