Low-temperature benchtop-synthesis of all-inorganic perovskite nanowires

A facile, low-temperature precipitation-based method is utilized for the synthesis of ultra-thin and highly uniform cesium lead bromide perovskite nanowires (NWs). The reactions facilitate the NWs' crystalline nature over micron-size lengths, while they impart tailored nanowire widths that range from the quantum confinement regime (similar to 7 nm) down to 2.6 nm. This colloidal synthesis approach is the first of its kind that is carried out on the workbench, without demanding chemical synthesis equipment. Importantly, the NWs' photoluminescence is shown to improve over time, with no requirement for tedious post-synthesis surface treatment.