Elucidating the Origins of High Preferential Crystal Orientation in Quasi-2D Perovskite Solar Cells.

ABSTRACT: Incorporating large organic cations to form 2D and mixed 2D/3D structures significantly increases the stability of perovskite solar cells. However, due to their low electron mobility, aligning the organic sheets to ensure unimpeded charge transport is critical to rival the high performances of pure 3D systems. While additives such as methylammonium chloride (MACl) can enable this preferential orientation, so far, no complete description exists explaining how they influence the nucleation process to grow highly aligned crystals. Here, by investigating the initial stages of the crystallization, as well as partially and fully formed perovskites grown using MACl, the origins underlying this favorable alignment are inferred. This mechanism is studied by employing 3-fluorobenzylammonium in quasi

SUBMITTER: Lehner LE 

PROVIDER: S-EPMC11475220 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature