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Table 4 Elemental distribution (atomic %) of the individual elements observed on a particular spot on (CH3NH3)3Sb2I9/NiO substrate shown in Fig. 4d

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

Spot Antimony Iodine Nickel Gold
Point 1 19.54 77.83 0.26 2.35
Point 2 0.00 6.83 43.44 49.72
Point 3 20.26 73.91 0.71 5.10
Point 4 19.64 79.22 0.20 0.93
Point 5 0.00 3.84 44.04 52.11