Fig. 1
From: Characterization of Bi-doped FAPbI3 perovskite films investigated by X-ray absorption spectroscopy
The optimized structural models, simulated by DFT calculation, of (a) the cubic FAPbI3 phase crystal structure within space group Pm-3 m. The predicted Bi substitution for the Pb atom of the cubic FAPbI3 phase is shown in (b). (c) Bi substitution at the cubic FAPbI3’s FA atom location. (d) The atomic structures of the hexagonal FAPbI3 phase within space group P63/m.
