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(A) Linear sweep voltammograms of FTO/MAPbBrxI3–x films in 0.1 M Bu4NPF6/DCM electrolyte (5 mV s–1 sweep rate). (B) Band diagram of MAPbBr1.5I1.5 together with the peak onset of the observed Faradaic events. (C) Variation of the peak currents of the first two redox waves as a function of MHP composition, with solid lines to guide the eye.
