Figure 3

SEM image of the perovskite film grown on (a) OEI-TiO2 CL-30 + 30 sec and (b) cross-sectional SEM image of the planar PSC processed with OEI-TiO2 CL-30 + 30 sec.

SEM image of the perovskite film grown on (a) OEI-TiO2 CL-30 + 30 sec and (b) cross-sectional SEM image of the planar PSC processed with OEI-TiO2 CL-30 + 30 sec.