Dielectric properties of hybrid perovskites and drift-diffusion modeling of perovskite cells

Abstract

A method based on DFT is used to obtained dielectric profiles. The high frequency Ɛ∞(z) and the static Ɛ_s(z) dielectric profiles are compared for 3D, 2D-3D and 2D Hybrid Organic Perovskites (HOP). A dielectric confinement is observed for the 2D materials between the high dielectric constant of the inorganic part and the low dielectric constant of the organic part. The effect of the ionic contribution on the dielectric constant is also shown. The quantum and dielectric confinements of 3D HOP nanoplatelets are then reported. Finally, a numerical simulation based on the SILVACO code of a HOP based solar cell is proposed for various permittivity of MAPbI₃.