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(a) Schematic representation of the assembly process together with a photograph of the large-scale assembly of the colloidal dispersion on the glass substrate under white light illumination. (b) Relevant physical properties of various solvents and the respective average contrast values. (c) CFM images of 1D gratings assembled from 5 mg/mL CsPbI3 perovskites in the corresponding solvents. (d) Intensity profiles from the CFM images shifted by 20 counts relative to each other.
