Fig. 1: Chemical polishing and passivation of perovskite film surface with BDA and EDAI2. | Nature Communications

Fig. 1: Chemical polishing and passivation of perovskite film surface with BDA and EDAI2.

From: Surface chemical polishing and passivation minimize non-radiative recombination for all-perovskite tandem solar cells

Fig. 1

a The surface component of control and BDA modified films before and after 10 nm Ar-etching. b The Sn 3d XPS spectra of the control perovskite sample, the inner region of the control sample after 10 nm etching, and perovskite film surface with BDA polishing. c, d KPFM images (3 × 3 μm2) and corresponding CPD variation of perovskite surface before and after BDA polishing. e, f GIWAXS patterns of the perovskite film before and after BDA polishing (0.1 mg mL–1) at a grazing incidence angle of 0.5°. g Scheme of BDA-EDAI2 based polishing and passivation of Sn–Pb mixed perovskite surface.

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