Scientists Propose Perovskite Films Homogenizing Strategy to Increase Conversion Efficiency (IMAGE)

Hefei Institutes of Physical Science, Chinese Academy of Sciences

Scientists Propose Perovskite Films Homogenizing Strategy to Increase Conversion Efficiency

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Figure.1 Presence of spatially vertical FA-Cs phase segregation. a, Illustration graph of inhomogeneous phase distribution caused by out-of-plane FA-Cs segregation. b, Electrostatic potential (ESP) image and molecular structure of PSP. c, Cations distribution obtained from Time-of-flight secondary ion mass spectroscopy (ToF-SIMS). d, Atomic percentage profile of the reference (solid line) and the PSP (dash line) extracted from depth-dependent XPS measurements. e-f, High-angle annular dark field (HAADF) transmission electron microscopy images for the reference sample (e) and the PSP treated sample (f) (scale bars refer to 200 nm). g-h, Enlarged GIXRD spectra collected from the bottom side of the reference (g) and PSP (h) treated perovskite films.

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