In Situ IR Spectroscopy Studies of Atomic Layer-Deposited SnO₂ on Formamidinium-Based Lead Halide Perovskite.

ABSTRACT: Perovskite photovoltaics has achieved conversion efficiencies of 26.0% by optimizing the optoelectronic properties of the absorber and its interfaces with charge transport layers (CTLs). However, commonly adopted organic CTLs can lead to parasitic absorption and device instability. Therefore, metal oxides like atomic layer-deposited (ALD) SnO₂ in combination with fullerene-based electron transport layers have been introduced to enhance mechanical and thermal stability. Instead, when ALD SnO₂ is directly processed on the absorber, i.e., without the fullerene layer, chemical modifications of the inorganic fraction of the perovskite occur, compromising the device performance. This study focuses on the organic fraction, particularly the formamidinium cation (FA⁺

SUBMITTER: Bracesco AEA 

PROVIDER: S-EPMC10416150 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature