Pyridine-Functionalized Organic Molecules in Perovskite Solar Cells: Toward Defects Passivation and Charge Transfer

Perovskite solar cells (PSCs) have garnered significant attention in recent years due to their high performance and cost-effective fabrication processes. However, the presence of defects in the bulk and interfaces of perovskite materials can significantly impact the photovoltaic performance and stability of these devices. One approach to addressing these defects is through the use of pyridine-based organic molecules. Pyridine functional molecules have shown promise in controlling the crystallization process of perovskite films, passivating defects, and enhancing charge carrier transport. These molecules can act as solvents, passivators, and charge transport layers in PSCs, contributing to improved device efficiency and stability. In this review, the use of pyridine-based organic molecules in PSCs is summarized, highlighting their roles and applications in different aspects of device performance. The interaction mechanisms of various pyridine functional molecules with perovskite materials are discussed, shedding light on the underlying principles governing their effectiveness in enhancing device performance. The challenges and opportunities in the utilization of pyridine functional molecules in PSCs are summarized. In addition, future potential strategies for designing pyridine functional multidentate ligands are promising, emphasizing the importance of understanding the interaction mechanisms and harnessing the unique properties of pyridine-based organic molecules for improved device performance and stability.