Colloidal nanocrystals of lead-free double-perovskites: Design and fundamental characterization of Cs2AgInCl6

Colloidal perovskites nanocrystals stand out among traditional bulk colloidal perovskites due to their unique properties, for instance; the quantum confinement effects and favorable optoelectronic properties. Lead halide perovskite nanocrystals are bright emitters, that focus attention for opto-electronic applications. However, the use of lead remains of great concern due to its toxicity and bioaccumulation in the ecosystem. The use of less toxic materials is central to this project. We use colloidal synthesis to study Cs2AgInCl6 double perovskites growth and degradation, tested the Ag significance to nanoparticles nucleation. In a series of synthetic experiments we demonstrate various crystal morphologies, their crystallographic study and AgCl by-product. Two-dimensional Cs2AgInCl6 perovskites nanoplates are shown for the first time for lead free perovskites. Low dimensional is exciting because they break the symmetry and enhance forbidden optical transmission.