Characterizing the Influence of Charge Extraction Layers on the Performance of Triple-Cation Perovskite Solar Cells

TL;DR

This study investigates how different charge extraction layers affect the performance of triple-cation perovskite solar cells by using various characterization techniques to analyze interfaces and optimize efficiency.

Contribution

It provides a comprehensive comparative analysis of charge transport layers and highlights measurement strategies for better interface understanding in perovskite solar cells.

Findings

Different fullerene-based electron transport layers influence device efficiency.

Self-assembled monolayers as hole transport layers improve interface quality.

Combining multiple characterization methods yields deeper insights into device interfaces.

Abstract

Selecting suitable charge transport layers and suppressing non-radiative recombination at interfaces to the absorber layer are vital to maximize the efficiency of halide perovskite solar cells. In this work, high-quality perovskite thin films and devices are fabricated with different fullerene-based electron transport layers and different self-assembled monolayers as hole transport layers. We then perform a comparative study of a significant variety of different electrical, optical and photoemission-based characterization techniques to quantify the properties of the solar cells, the individual layers and importantly the interfaces between them. In addition, we highlight the limitations and problems of the different measurements, the insights gained by combining different methods and the different strategies to extract information from the experimental raw data.