In-plane self-assembly and lasing performance of cesium lead halide perovskite nanowires

摘要

Inorganic cesium lead halide perovskite nanowires (NWs) were synthesised by an in-plane self-assembly method. With the assistance of saturated solvent vapour, perovskite microparticles self-assembled into NWs. By stoichiometric adjustment of the halogen anion components in the NWs, their photoluminescence could be tuned to span the entire visible range. A detailed investigation of the lasing properties of the in-situ perovskite NWs and microplates revealed a lasing range of 420–560?nm, with typical thresholds of 18.8?μJ cm~(?2) for CsPbBr_(3) NWs and 8.87?μJ cm~(?2) for CsPbBr_(x) Cl_(3-x ) microplates. The NWs exhibited robust stability under extended laser pumping in ambient atmosphere.