Clean, cleaved surfaces of the photovoltaic perovskite.
Márton KollárLuka ĆirićJ Hugo DilAndrew WeberStefan MuffHenrik Moodysson RønnowBálint NáfrádiBenjamin Pierre MonnierJeremy Scott LuterbacherLászló ForróEndre HorváthPublished in: Scientific reports (2017)
The surface of a material is not only a window into its bulk physical properties, but also hosts unique phenomena important for understanding the properties of a solid as a whole. Surface sensitive techniques, like ARPES (Angle-resolved photoemission spectroscopy), STM (Scanning tunneling microscopy), AFM (Atomic force microscopy), pump-probe optical measurements etc. require flat, clean surfaces. These can be obtained by cleaving, which is usually possible for layered materials. Such measurements have proven their worth by providing valuable information about cuprate superconductors, graphene, transition metal dichalcogenides, topological insulators and many other novel materials. Unfortunately, this was so far not the case for the cubic, organo-metallic photovoltaic perovskite which morsels during the cleavage. Here we show a method which results in flat, clean surfaces of CH3NH3PbBr3 which allows surface sensitive measurements, badly needed for the understanding and further engineering of this material family.
Keyphrases
- atomic force microscopy
- high speed
- high resolution
- room temperature
- single molecule
- transition metal
- solar cells
- biofilm formation
- living cells
- mental health
- high efficiency
- staphylococcus aureus
- mass spectrometry
- optical coherence tomography
- highly efficient
- high throughput
- escherichia coli
- walled carbon nanotubes
- reduced graphene oxide