▎ 摘　　要

NOVELTY - Forming a perovskite layer involves 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 layer, where perovskite layer includes a multiple groups of one or more perovskite grains, each of multiple groups wrapped in a silica shell. USE - Method for forming perovskite layer. ADVANTAGE - The method is highly efficient photovoltaic materials, cost-ffective and highly competitive for commercial applications. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a semiconductor device, which comprises a cathode layer, an anode layer and an active layer disposed between the cathode layer and the anode layer, where active layer includes a perovskite layer, wherein the perovskite layer includes a multiple groups of one or more perovskite grains, each of multiple groups wrapped in a silica shell.