Figure 4: Elemental analysis by SEM-EPMA.
From: Inorganic hole conductor-based lead halide perovskite solar cells with 12.4% conversion efficiency
(a) TiO2/CH3NH3PbI3 (single deposition)/Au. (b) TiO2/CH3NH3PbI3 (double deposition)/Au. (c) TiO2/CH3NH3PbI3 (single deposition)/CuSCN/Au. (d) TiO2/CH3NH3PbI3 (double deposition)/CuSCN/Au. The upper bright line observed on the upper part of each cross-sectional s.e.m. is due to the Au cathode. Scare bar, 500 nm.
