Synergistic Role of Water and Oxygen Leads to Degradation in Formamidinium-Based Halide Perovskites.

ABSTRACT: Mixed-cation metal halide perovskites have shown remarkable progress in photovoltaic applications with high power conversion efficiencies. However, to achieve large-scale deployment of this technology, efficiencies must be complemented by long-term durability. The latter is limited by external factors, such as exposure to humidity and air, which lead to the rapid degradation of the perovskite materials and devices. In this work, we study the mechanisms causing Cs and formamidinium (FA)-based halide perovskite phase transformations and stabilization during moisture and air exposure. We use in situ X-ray scattering, X-ray photoelectron spectroscopy, and first-principles calculations to study these chemical interactions and their effects on structure. We unravel a surface reaction path

SUBMITTER: Hidalgo J 

PROVIDER: S-EPMC10655111 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature