Stern Avigail, Aharon Sigalit, Binyamin Tal, Karmi Abeer, Rotem Dvir, Etgar Lioz, Porath Danny
Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
Adv Mater. 2020 Mar;32(12):e1907812. doi: 10.1002/adma.201907812. Epub 2020 Feb 17.
Perovskite nanostructures have attracted much attention in recent years due to their suitability for a variety of applications such as photovoltaics, light-emitting diodes (LEDs), nanometer-size lasing, and more. These uses rely on the conductive properties of these nanostructures. However, electrical characterization of individual, thin perovskite nanowires has not yet been reported. Here, conductive atomic force microscopy characterization of individual cesium lead halide nanowires is presented. Clear differences are observed in the conductivity of nanowires containing only bromide and nanowires containing a mixture of bromide and iodide. The differences are attributed to a higher density of crystalline defects, deeper trap states, and higher inherent conductivity for nanowires with mixed bromide-iodide content.
近年来，钙钛矿纳米结构因其适用于多种应用，如光伏、发光二极管（LED）、纳米尺寸激光等，而备受关注。这些应用依赖于这些纳米结构的导电特性。然而，单个细钙钛矿纳米线的电学表征尚未见报道。在此，展示了单个卤化铯铅纳米线的导电原子力显微镜表征。在仅含溴化物的纳米线和含溴化物与碘化物混合物的纳米线的电导率方面观察到明显差异。这些差异归因于含混合溴化物 - 碘化物的纳米线具有更高密度的晶体缺陷、更深的陷阱态和更高的固有电导率。
