Do not use the as-downloaded CIF. You must perform ionic relaxation to account for the generalized gradient approximation (GGA-PBE). However, beware: PBE typically overestimates the lattice parameter of FAPbI₃ by ~1-2%. Use the experimental CIF as a starting point, relax with ISIF=3 (VASP), then extract the relaxed FAPbI3 CIF file for band structure calculations.
). Some refinements at room temperature suggest a trigonal ( P3m1cap P 3 m 1 ) symmetry due to slight tilts. : Approximately Significance : It features corner-sharing PbI6cap P b cap I sub 6 fapbi3 cif file
If you use a FAPbI3 CIF file for published research, you must cite both: Do not use the as-downloaded CIF
FAPbI3 is a hybrid organic-inorganic perovskite with the general formula ABX3cap A cap B cap X sub 3 : Formamidinium cation B-site : Lead ( Pb2+cap P b raised to the 2 plus power X-site : Iodide ( I−cap I raised to the negative power Use the experimental CIF as a starting point,
FAPBi3 CIF files are a crucial component of materials science research, particularly in the study and application of perovskite materials. Understanding and effectively working with these files enable researchers to unlock the full potential of FAPBi3 in optoelectronic devices. As the field continues to evolve, the importance of accurate structural information and the role of CIF files in advancing materials science will only grow.