We can use a 3D finite element method (FEM) technique to simulate a planar perovskite solar cell. To fully characterize the proposed device, combined optical-electrical modeling method must be used.

The model must be validated through comparisons with experimental work. A new structure can be introduced which includes a layer of bis-imidazolium PbI₄ as absorber layer in the perovskite solar cell (PSC).

The optical properties of the layered pervoskite can be computed with the ab-initio plane wave technique.

This approach allows to predict and optimize some characteristics such as the band-gap (BG) of the absorber layer to improve the entire efficiency of the device.

In this new structure, we can computed power conversion efficiency (PCE) when the thickness of bis-imidazolium PbI₄ is 200 nm. The short circuit current (Jsc) can be improved by coating 40 nm MgF₂ layer which act as an anti reflector layer on the surface of the presented PSC. The influence of periodically corrugated back and anti reflector on the presented PSC can be considered.