Bilateral alkylamine for suppressing charge recombination and improving stability in blade-coated perovskite solar cells.

ABSTRACT: The power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) are already higher than that of other thin film technologies, but laboratory cell-fabrication methods are not scalable. Here, we report an additive strategy to enhance the efficiency and stability of PSCs made by scalable blading. Blade-coated PSCs incorporating bilateral alkylamine (BAA) additives achieve PCEs of 21.5 (aperture, 0.08 cm²) and 20.0% (aperture, 1.1 cm²), with a record-small open-circuit voltage deficit of 0.35 V under AM1.5G illumination. The stabilized PCE reaches 22.6% under 0.3 sun. Anchoring monolayer bilateral amino groups passivates the defects at the perovskite surface and enhances perovskite stability by exposing the linking hydrophobic alkyl chain. Grain boundaries are r

SUBMITTER: Wu WQ 

PROVIDER: S-EPMC6408151 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature