Fig. 2: The effect of moisture treatment on the perovskite film. | Nature Communications

Fig. 2: The effect of moisture treatment on the perovskite film.

From: Targeted elimination of tetravalent-Sn-induced defects for enhanced efficiency and stability in lead-free NIR-II perovskite LEDs

Fig. 2

a Sn 3d5/2, (b) Cl 2p, and (c) O 1 s core-level XPS spectra of CsSnI3-SnCl2 film before and after moisture treatment. Top-view SEM images of CsSnI3-SnCl2 film (d) before and (e) after moisture treatment. Scale bar, 2 μm. f XRD patterns of CsSnI3-SnCl2 film before and after moisture treatment.

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