Structural and compositional properties of 2D CH₃NH₃PbI₃ hybrid halide perovskite: a DFT study.

ABSTRACT: Two-dimensional (2D) hybrid halide perovskites have been scrutinized as candidate materials for solar cells because of their tunable structural and compositional properties. Results based on density functional theory demonstrate its thickness-dependent stability. We have observed that the bandgap decreases from the mono- to quad-layer because of the transformation from 2D towards 3D. Due to the transformation, the carrier mobility is lowered with the corresponding smaller effective mass. On the other hand, the multilayer structures have good optical properties with an absorption coefficient of about 10⁵ cm^-1. The calculated absorption spectra lie between 248 nm and 496 nm, leading to optical activity of the 2D multilayer CH₃NH₃PbI₃ sys

SUBMITTER: Kumavat SR 

PROVIDER: S-EPMC9468801 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature