Fapbi3 Cif | File 2021
# Sample structure snippet for alpha-FAPbI3 data_FAPbI3_cubic _cell_length_a 6.36 _cell_length_b 6.36 _cell_length_c 6.36 _cell_angle_alpha 90.0 _cell_angle_beta 90.0 _cell_angle_gamma 90.0 _symmetry_space_group_name_H-M 'Pm-3m' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Pb1 0.00000 0.00000 0.00000 I1 0.50000 0.00000 0.00000 ... (FA cation atoms) Use code with caution. The FA cation (
Understanding the FAPbI3 CIF File: A Guide to Formamidinium Lead Iodide Crystal Structure Formamidinium lead iodide ( FAPbI3FAPbI sub 3
Using the CIF, software like VESTA or Mercury calculates the powder X-ray diffraction pattern. Key peaks for α-FAPbI₃:
) is a premier hybrid organic-inorganic perovskite (HOIP) favored for high-efficiency solar cells due to its near-ideal band gap of approximately
CIF file contains the fundamental structural data of Formamidinium Lead Iodide, including: Cell lengths ( ) and angles ( Space Group: The symmetry of the crystal (e.g., for the cubic perovskite phase). Atomic Positions: Fractional coordinates for Lead ( ), Iodine ( ), Carbon ( ), Nitrogen ( ), and Hydrogen ( fapbi3 cif file
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Once downloaded, the CIF file serves as the starting point for various computational and analytical workflows:
For a solid feature in a FAPbI3 (Formamidinium Lead Iodide) CIF file, the
The is the world’s most widely used open-access database for inorganic materials data, specifically designed for computational research. Key peaks for α-FAPbI₃: ) is a premier
Experimentalists use CIF files to generate . When a lab synthesizes a new batch of FAPbI₃, they compare their experimental peaks against the pattern derived from the CIF file to confirm they have successfully created the C. Structural Engineering
has multiple structures depending on temperature, a "full text" or complete overview of its CIF data requires understanding its distinct polymorphic phases. 🔬 Core Crystallographic Phases of FAPbI3FAPbI sub 3 To work with a FAPbI3FAPbI sub 3
is essential for modeling its various phases, particularly the photoactive black -phase and the yellow non-perovskite 1. Key Structural Data for FAPbI₃
You convert the CIF into a POSCAR or .in file. The cubic cell allows for fast k-point sampling. However, note that DFT often requires relaxing the structure (especially the H atoms of FA, which are missing in basic CIFs). Once downloaded, the CIF file serves as the
structure at room temperature. Note that in refined CIFs, the organic cap F cap A raised to the positive power cation (Formamidinium) is often modeled as disordered due to its rapid rotation within the lead-iodide cage. Site Occupancy Source: Adapted from GitHub - WMD-group/hybrid-perovskites 3. Stability Considerations is the goal for performance, cap F cap A cap P b cap I sub 3
) where the FA cation sits inside a framework of vertex-sharing PbI6cap P b cap I sub 6 octahedra. Desirable photovoltaic phase (bandgap CIF Note: The -phase is often described as cubic (
exists in different phases. The CIF file used depends entirely on which phase is being studied. (Black Phase - Perovskite) Perovskite structure ( ABX3cap A cap B cap X sub 3
CIF file , explaining its content, the difference between its perovskite and non-perovskite phases, and where to find validated structural data. 1. What is a FAPbI3 CIF File?
