Stabilizing high-efficiency perovskite solar cells via strategic interfacial contact engineering.

ABSTRACT: Surface passivation in perovskite solar cells can enhance device efficiency, yet incomplete interfacial functionality poses challenges to long-term reliability. Here we present a strategic interfacial engineering approach using sodium heptafluorobutyrate to fully functionalize the perovskite surface. Sodium heptafluorobutyrate acts as an ion shield that tunes the perovskite surface work function and increases the defect formation energy, resulting in an improved interface with the electron transport layer that minimizes recombination and boosts electron extraction under operation. We find that a sodium-heptafluorobutyrate-functionalized perovskite surface promotes a uniform, compact C₆₀ layer that effectively blocks ion diffusion and stabilizes the device stack. This approach al

SUBMITTER: Li G 

PROVIDER: S-EPMC12774855 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature