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(a, b) Defect formation energies (DFE) under I-medium condition and (c, d) thermodynamic ionization levels (TILs) of native point defects in PEA2PbI4 and PEA2SnI4, calculated at the PBE0 level. The band gaps in the diagrams correspond to those calculated at the PBE0-SOC level of theory. The dashed lines indicate the position of the native Fermi level.
