Inducing ferroelastic domains in single-crystal CsPbBr3 perovskite nanowires using atomic force microscopy
Autor: | Alexander Björling, Ella Sanders, Sandra Benter, Simone Sala, Austin Irish, Lucas L.A.B. Marçal, Rainer Timm, Amnon Rothman, Jesper Wallentin, Zhaojun Zhang, Eva L. Unger, Ernesto Joselevich, Eitan Oksenberg, Anders Mikkelsen, Dmitry Dzhigaev, Susanna Hammarberg |
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Rok vydání: | 2021 |
Předmět: |
Diffraction
Materials science Ferroelasticity Physics and Astronomy (miscellaneous) Condensed matter physics Nanowire 02 engineering and technology Crystal structure 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Ferroelectricity 0103 physical sciences Photovoltaics and Wind Energy General Materials Science Orthorhombic crystal system 010306 general physics 0210 nano-technology Single crystal Perovskite (structure) |
Zdroj: | Physical Review Materials |
ISSN: | 2475-9953 |
Popis: | Ferroelectric and ferroelastic domains have been predicted to enhance metal halide perovskite (MHP) solar cell performance. While the formation of such domains can be modified by temperature, pressure, or strain, established methods lack spatial control at the level of single domains. Here, we induce the formation of ferroelastic domains in CsPbBr3 nanowires at room temperature using an atomic force microscope (AFM) tip and visualize the domains using nanofocused x-ray diffraction with a 60 nm beam. Regions scanned with a low AFM tip force show orthorhombic 004 reflections along the nanowire axis, while regions exposed to higher forces exhibit 220 reflections. The applied stress locally changes the crystal structure, leading to lattice tilts that define ferroelastic domains, which spread spatially and terminate at {112}-type domain walls. The ability to induce individual ferroelastic domains within MHPs using AFM gives new possibilities for device design and fundamental experimental studies. |
Databáze: | OpenAIRE |
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