# Modeling photoconversion efficiency of perovskite solar cells

## TL;DR

This paper presents a theoretical model for the photoconversion efficiency of perovskite solar cells, aligning well with experimental data and revealing key factors influencing efficiency and current-voltage behavior.

## Contribution

It introduces a novel theoretical approach to model efficiency in perovskite solar cells, considering surface textures and recombination effects.

## Key findings

- Maximum efficiency of 29% in ideal conditions.
- Surface and rear effects significantly influence device performance.
- Current-voltage ideality factor of 2 explained by surface effects.

## Abstract

A theoretical approach to photoconversion efficiency modeling in perovskite p-i-n structures is developed. The results of this modeling compare favorably with the experiment and indicate that the surfaces of the perovskite solar cells (SCs) are naturally textured. It is shown that photoconversion efficiency in the limiting case of negligible Shockley-Read-Hall and surface recombination and in the absence of optical losses reaches the value of 29%. In the realistic case, the current-voltage curve ideality factor equals 2. This value is not due to recombination in the space-charge region; rather, it can be explained by taking into account the effect of the rear surface and high excitation level.