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Table 13 Elemental distribution (atomic %) of the individual elements observed on Cu3BiI6/NiO substrate shown in Fig. 8f

From: Lead-free perovskite solar cells using Sb and Bi-based A3B2X9 and A3BX6 crystals with normal and inverse cell structures

Spot Copper Bismuth Iodine Nickel Oxygen Silicon
Point 1 2.19 0.46 3.75 0.57 56.42 36.61
Point 2 4.18 1.03 12.15 0.71 48.00 33.92
Point 3 1.94 0.48 3.77 0.66 51.91 41.23
Point 4 3.29 1.84 7.70 0.52 52.41 34.24