Turn-on Fluorescence Humidity Sensing Based on Cs4PbBr6 Nanocrystal Array

All-inorganic cesium lead halide perovskite (CsPbX 3 , X = Cl, Br, and I) nanocrystals (NCs) have attracted significant attention as promising photoelectric materials in recent years. Their non-fluorescent derivative, Cs 4 PbX 6 , can...