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(a) Density-voltage (I–V) cures of the best-performing cell, the voltage scan rate is 50 mV/s (b) Photocurrent density and PCE as a function of time for the same cell under 0.833 V, (c) External quantum efficiency (EQE) spectrum of the best-performing cell, (d) Histograms of PCEs measured for 40 cells prepared by using 8 mg/mL MAI in NBA.
