Fig. 5: Photovoltaic performance of PSCs.

Best-performing J–V curves with reverse and forward scans of PSCs with a c-SnO2 ETLs, b SnO2 NPs ETLs, and c SnO2 QDs ETLs. Inset: stabilized Voc as a function of the time. d Stabilized PCEs at the maximum power point under simulated solar illumination (AM1.5 G, 100 mW cm−2). Histograms of the device photovoltaic parameters e Voc, f Jsc, g FF, and h PCE obtained from a batch of PSCs with different ETLs. i Average h-index with standard deviation extracted from J–V curves of PSCs with various ETLs