Fig. 3From: Electrodeposition of SnO2 on FTO and its Application in Planar Heterojunction Perovskite Solar Cells as an Electron Transport LayerTop-view SEM images of substrates for different deposition time. (a) Bare FTO and SnO2 films deposited for (b) 150 s, (c) 180 s, and (d) 210 s. Corresponding photovoltaic performance: (e) J–V curves and (f) photovoltaic parameters of PSCs with electrodeposited SnO2 ETL. Scale bar is 1 μmBack to article page