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From: Reconstructing the perovskite surface with a homogeneous electric potential by reducing localized charge for efficient and durable perovskite solar cells

Reconstructing the perovskite surface with a homogeneous electric potential by reducing localized charge for efficient and durable perovskite solar cells

Figure 1. (A) The chemical structure of FTAC and a schematic diagram illustrating the function of FTAC on the surface of the perovskite film; (B) The passivated V_I-FAPbI₃ surface structure with FTA⁺; (C) Density of states (DOS) for (B) systems, and the control group is shown in Supplementary Figure 3A. The DOS is referenced to the Fermi level of each system (set to 0 eV); (D) Charge density distribution of the (B) system; (E) The passivated V_I-FAPbI₃ surface structure with a Cl atom; (F) DOS for (E) systems; (G) Charge density distribution of the (E) system. FTAC: (Ferrocenylmethyl)trimethylammonium chloride; FTA: (ferrocenylmethyl)trimethylammonium cation.