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Table 2 Elemental distribution (atomic %) of the individual elements observed on a particular spot on (CH3NH3)3Bi2I9/NiO film shown in Fig. 4b

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

Spot Bismuth Iodine Nickel Gold
Point 1 13.92 68.52 10.88 6.95
Point 2 0.00 11.14 46.54 42.31
Point 3 0.00 12.25 45.62 42.12
Point 4 18.07 74.56 2.33 4.64
Point 5 19.01 76.55 0.92 3.29