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(a) XRD patterns of perovskite films as a function of Cl–GO amounts. SEM images of perovskite films with different amounts of Cl–GO in the precursor solution: (b) pristine 0.0 vol%, (c) 1.0 vol%, (d) 2.0 vol%, (e) 5.0 vol%, and (f) 7.5 vol% Cl-GO. Data taken from ref. [85]. Copyright Springer Science Business Media, LLC, part of Springer Nature@2020.
