Electrical Characterization of Individual Cesium Lead Halide Perovskite Nanowires Using Conductive AFM
Avigail Stern1,2, Sigalit Aharon1,2, Tal Binyamin1,2
1Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
Advanced Materials (Deerfield Beach, Fla.)
|February 18, 2020
Summary
This study presents the first electrical characterization of individual perovskite nanowires. Cesium lead halide nanowires with mixed bromide-iodide content show higher conductivity due to fewer defects.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Perovskite nanostructures are promising for photovoltaics, LEDs, and lasers.
- Their applications depend on electrical conductivity.
- Individual nanowire electrical properties remain largely uncharacterized.
Purpose of the Study:
- To electrically characterize individual cesium lead halide nanowires.
- To investigate conductivity differences between bromide-only and mixed bromide-iodide nanowires.
- To correlate conductivity with material properties.
Main Methods:
- Conductive atomic force microscopy (CAFM) was used.
- Individual cesium lead halide nanowires were analyzed.
- Electrical properties were measured at the nanoscale.
Main Results:
- Distinct conductivity variations were observed between nanowire types.
- Bromide-iodide mixed nanowires exhibited higher conductivity.
- Differences were linked to crystalline defects and trap states.
Conclusions:
- Individual perovskite nanowire conductivity can be measured using CAFM.
- Composition significantly impacts nanowire electrical properties.
- Mixed halide perovskite nanowires offer enhanced conductivity for electronic applications.
Keywords:
cesium lead halidecharge transportconductive propertiescrystalline defectsperovskite nanowires
