Molecular Design and Operational Stability: Toward Stable 3D/2D Perovskite Interlayers.

ABSTRACT: Despite organic/inorganic lead halide perovskite solar cells becoming one of the most promising next-generation photovoltaic materials, instability under heat and light soaking remains unsolved. In this work, a highly hydrophobic cation, perfluorobenzylammonium iodide (5FBzAI), is designed and a 2D perovskite with reinforced intermolecular interactions is engineered, providing improved passivation at the interface that reduces charge recombination and enhances cell stability compared with benchmark 2D systems. Motivated by the strong halogen bond interaction, (5FBzAI)₂PbI₄ used as a capping layer aligns in in-plane crystal orientation, inducing a reproducible increase of ≈60 mV in the V _oc, a twofold improvement compared with its analogous monofluori

SUBMITTER: Paek S 

PROVIDER: S-EPMC7539205 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature