Pyridine-assisted solvent engineering for high-quality narrow-bandgap perovskites in efficient tandem modules.

ABSTRACT: All-perovskite tandem photovoltaic modules represent a promising technology for enhancing power conversion efficiency. However, a significant challenge remains in preparing high-quality, large-area tin-lead mixed narrow-bandgap (NBG) perovskite films for these tandem modules. Here, we develop a method to prepare large-area, compact, and uniform NBG perovskite films by modulating the crystallization process through solvent engineering. Specifically, we introduce pyridine, a solvent with strong donor coordinating ability and high saturated vapor pressure, into the solvent system. The strong coordination ability of pyridine facilitates better formation of intermediate phases during the crystallization process of tin-based NBG perovskite films, while its high saturated vapor pressure enables t

SUBMITTER: Sun J 

PROVIDER: S-EPMC12511562 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature