CsPbBr3 perovskite nanowires and their optical properties

Inorganic cesium lead halide perovskites CsPbX3 nanocrystals (NCs) have been widely used in optoelectronic applications due to their excellent optical properties. Furthermore, the final morphology and size of as-grown CsPbX3 NCs play crucial roles in determining their stability and luminescent properties. Here, CsPbBr3 NCs with various morphologies such as nanocubes, nanospheres, nanorods (NRs) and nanowires (NWs) have been fabricated by controlling the amount of solvent octadecene (ODE), the concentrations of trioctylphosphine oxide (TOPO)/tetradecylphosphonic acid (TDPA), the reaction temperatures and the final cooling rate. Finally, high-quality CsPbBr3 NWs exhibiting cubic phase have been successfully obtained by optimizing the reaction parameters. These well-controlled CsPbBr3 NWs with aspect ratio ~19 show great potential in helping nanodevice development. In summary, this study provides important insights for producing inorganic perovskite materials with tunable morphologies and properties for multi-applications.