查看文章

Here, we demonstrate the successful synthesis of brightly emitting colloidal cesium lead halide (CsPbX₃, X = Cl, Br, I) nanowires (NWs) with uniform diameters and tunable compositions. By using highly monodisperse CsPbBr₃ NWs as templates, the NW composition can be independently controlled through anion-exchange reactions. CsPbX₃ alloy NWs with a wide range of alloy compositions can be achieved with well-preserved morphology and crystal structure. The NWs are highly luminescent with photoluminescence quantum yields (PLQY) ranging from 20% to 80%. The bright photoluminescence can be tuned over nearly the entire visible spectrum. The high PLQYs together with charge transport measurements exemplify the efficient alloying of the anionic sublattice in a one-dimensional CsPbX₃ system. The wires increased functionality in the form of fast photoresponse rates and the low defect density suggest …