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Table 8 Elemental distribution (atomic %) of the individual elements observed on a particular spot on Ag3BiI6/TiO2 substrate shown in Fig. 8a

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

Spot Bismuth Silver Iodine Titanium Oxygen Silicon
Point 1 4.75 32.89 33.54 11.97 9.11 7.75
Point 2 2.01 65.52 16.29 7.19 5.76 3.24
Point 3 2.73 20.47 19.50 15.86 19.65 21.79
Point 4 1.80 53.99 18.38 10.09 11.56 4.18
Point 5 5.03 43.57 26.93 15.62 3.98 4.87