Figure 2 | In situ monitoring of the enhanced surface potential of the MHP film using the KPFM probe as a scraper. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2 | In situ monitoring of the enhanced surface potential of the MHP film using the KPFM probe as a scraper.

Caption

Figure 2 |  In situ monitoring of the enhanced surface potential of the MHP film using the KPFM probe as a scraper. Surface potential distributions of the MAPbBr3 film (20 μm × 20 μm) with different scanning times within a 10 μm × 10 μm area (marked by green dash lines): (a) pristine, (b) 1 scan, and (c) 10 scans; Top: height diagram and bottom: surface potential mapping, respectively. (d) PL spectra of MAPbBr3 films scanned by 0, 1 and 10 times, respectively, using the KPFM probe. (e) Correlation between changes in the surface charge density and the PL intensity and scan times using the KPFM probe.

Credit

Xin Guo et al.

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