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Table 1 Elemental distribution (atomic %) of the individual elements observed on particular spot on (CH3NH3)3Bi2I9/TiO2 film shown in Fig. 4a

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

Spot Bismuth Iodine Titanium Gold
Point 1 10.00 42.10 45.55 2.72
Point 2 12.87 50.35 34.17 2.59
Point 3 17.25 64.87 14.49 3.11
Point 4 6.32 25.79 64.17 3.29
Point 5 2.79 11.86 80.89 4.02