Electrical Characterization of Individual Cesium Lead Halide Perovskite Nanowires Using Conductive AFM

Avigail Stern; Sigalit Aharon; Tal Binyamin; Abeer Karmi; Dvir Rotem; Lioz Etgar; Danny Porath

doi:10.1002/adma.201907812

Electrical Characterization of Individual Cesium Lead Halide Perovskite Nanowires Using Conductive AFM

Adv Mater. 2020 Mar;32(12):e1907812. doi: 10.1002/adma.201907812. Epub 2020 Feb 17.

Authors

Avigail Stern^{1

2}, Sigalit Aharon^{1

2}, Tal Binyamin^{1

2}, Abeer Karmi^{1

2}, Dvir Rotem^{1

2}, Lioz Etgar^{1

2}, Danny Porath^{1

2}

Affiliations

¹ Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
² Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem, Jerusalem, 91904, Israel.

PMID: 32064674
DOI: 10.1002/adma.201907812

Abstract

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.

Keywords: cesium lead halide; charge transport; conductive properties; crystalline defects; perovskite nanowires.

Abstract

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