Remarkable performance recovery in highly defective perovskite solar cells by photo-oxidation.

ABSTRACT: Exposure to environmental factors is generally expected to cause degradation in perovskite films and solar cells. Herein, we show that films with certain defect profiles can display the opposite effect, healing upon exposure to oxygen under illumination. We tune the iodine content of methylammonium lead triiodide perovskite from understoichiometric to overstoichiometric and expose them to oxygen and light prior to the addition of the top layers of the device, thereby examining the defect dependence of their photooxidative response in the absence of storage-related chemical processes. The contrast between the photovoltaic properties of the cells with different defects is stark. Understoichiometric samples indeed degrade, demonstrating performance at 33% of their untreated counterparts, whil

SUBMITTER: Goetz KP 

PROVIDER: S-EPMC10286220 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature