SKPM study on organic-inorganic perovskite materials
Source abstract
Abstract
We report Atomic Force Microscopy (AFM) and Scanning Kelvin Probe Microscopy (SKPM) studies on the surface morphology and surface potential properties of CH3NH3PbI3, CH3NH3PbI3-xClx, CH3NH3PbI3-xBrx and CH3NH3PbBr3-xClx, respectively. For CH3NH3PbI3 rod structure, its surface potential is independent of the precursor concentration, suggesting a robust electronic feature. Surface potential studies of CH3NH3PbI3 particle reveal that the Fermi level within CH3NH3PbI3 is strongly influenced by the substrate. In the case of CH3NH3PbI3-xClx, its surface potential depends on precursor concentrations and we suspect that chlorine concentrated solutions might lead to more chlorine incorporation in the final products, thus lowering its Fermi level. Also, we studied the surface potentials of CH3NH3PbI3-xBrx and CH3NH3PbBr3-xClxwith specified halide ratios. The surface potential differences between different samples are related to their work function variations. These results are helpful to the understanding of the structural and electronic properties of perovskite materials.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Solid-state spectroscopy and crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Chongqing University , Chongqing 401331, China
Funding
National Natural Science Foundation of China
References (55)
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