Insights from Device Modeling of Perovskite Solar Cells

TL;DR

This paper reviews how device modeling and simulation provide insights into the physics of perovskite solar cells, highlighting effects like ionic influence, dielectric properties, and interfacial dipoles that impact device performance.

Contribution

It offers a comprehensive analysis of modeling factors affecting perovskite solar cells and introduces the concept of self-induced interfacial dipoles enhancing device voltage.

Findings

Interfacial electronic dipoles increase open-circuit voltage.

Modeling reveals the impact of ions and dielectric properties.

Future directions include addressing open questions with simulations.

Abstract

In this perspective, we explore the insights into the device physics of perovskite solar cells gained from modeling and simulation of these devices. We discuss a range of factors that influence the modeling of perovskite solar cells, including the role of ions, dielectric constant, density of states, and spatial distribution of recombination losses. By focusing on the effect of non-ideal energetic alignment in perovskite photovoltaic devices, we demonstrate a unique feature in low recombination perovskite materials - the formation of an interfacial, primarily electronic, self-induced dipole that results in a significant increase in the built-in potential and device open-circuit voltage. Finally, we discuss the future directions of device modeling in the field of perovskite photovoltaics, describing some of the outstanding open questions in which device simulations can serve as a particularly powerful tool for future advancements in the field.