Seeding Agents in Metal Halide Perovskite Solar Cells: From Material to Mechanism

Abstract

AbstractMetal halide perovskite solar cells (PSCs) have been showing up in the commercial field, with an inspiring power conversion efficiency (PCE) of over 26 % in the laboratory. The quality of perovskite films is still a bottleneck due to the random and fast crystallization of ionic perovskite materials. Seeding agent‐mediated crystallization has consistently been recognized as an efficient method for preparing bulk single crystals and high‐quality films. Herein, we summarized the seeding mechanism, characterization techniques, and seeding agents working in different locations during PSC device fabrication. This Review could further facilitate researchers with a deeper understanding of seeding agents and enhance more choices for seeding crystallization to improve the performance further and the device's large‐scale fabrication toward commercialization.