Perovskite FAPbI3 Powder Chemical Properties

InChI

InChI=1S/CH4N2.3HI.Pb/c2-1-3;;;;/h1H,(H3,2,3);3*1H;/q;;;;+2/p-2

InChIKey

NANFRINOBKYWIX-UHFFFAOYSA-L

SMILES

C(N)=N.[Pb+2]([I-])([I-])[I-].[H+]

Perovskite FAPbI3 Powder Usage And Synthesis

Description

Currently, the high-efficiency perovskite solar cells are predominantly fabricated with formamidinium lead iodide (FAPbI3), which exhibits higher thermal stability against decomposition into the secondary compound of PbI2, a broader absorption spectrum that extends further into the red, and an ideal bandgap (~1.4?eV) closer to the Shockley–Queisser optimum, as compared with the prototypical methylammonium lead iodide (MAPbI3). The superior optoelectronic properties of FAPbI3 originate from the high-symmetry cubic perovskite structure (black α-phase). At room temperature, the black phase, also known as α- phase, of FAPbI3, evolves towards the most stable non-perovskite hexagonal yellow δ-phase (δ-FAPbI3) because α-FAPbI3 is thermodynamically unstable at temperatures below 150 °C[1].

References

[1] Liang, Yuhang et al. “Toward stabilization of formamidinium lead iodide perovskites by defect control and composition engineering.” Nature Communications 41 1 (2024).