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Table 12 Elemental distribution (atomic %) of the individual elements observed on Cu3BiI6/TiO2 substrate shown in Fig. 8e

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 Titanium Oxygen Silicon
Point 1 16.38 1.59 22.26 8.54 32.17 19.06
Point 2 9.18 1.65 17.42 9.76 37.88 24.11
Point 3 6.21 1.48 13.18 8.04 42.66 28.44
Point 4 3.20 1.90 9.40 8.35 47.70 29.45