WRAPPING PEROVSKITE GRAINS WITH SILICA SHELLS FOR IMPROVING STABILITY AND EFFICIENCY OF PEROVSKITE ELECTRONIC DEVICES

摘要

Systems and methods for enhancing the stability and efficiency of perovskite materials, and devices incorporating such perovskite materials. A method of making a perovskite layer includes mixing a perovskite solution with a silica shell precursor solution to produce a perovskite-silica precursor solution, and spin casting or drop casting the perovskite-silica precursor solution on a substrate to form a perovskite material or material layer, wherein the perovskite material or material layer includes a plurality of groups of one or more perovskite grains, each of said plurality of groups wrapped in a silica shell. The silica shell precursor solution may have a chemical structure of R_n-Si-(OR)_4-n, where "R" is an alkyl, aryl, or organofunctional group, and "OR" is a methoxy, ethoxy, or acetoxy group.