Fig. 4From: Electrodeposition of SnO2 on FTO and its Application in Planar Heterojunction Perovskite Solar Cells as an Electron Transport LayerTop-view SEM images of SnO2 films electrodeposited at various bath temperatures. (a) RT, (b) 40 °C, e(c) 60 °C, and (d) 70 °C. 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