Quasi-2D Scaffolding for Enhanced Stability and Efficiency in 1.67 eV Cs-Rich Pure-Iodide Perovskite Solar Cells.

ABSTRACT: Cesium lead triiodide (CsPbI₃) perovskitesare promising candidates for top cells in tandem solar cells owing to their superior thermal and photostability. However, their practical application is hindered by poor phase stability, as CsPbI₃ readily converts from the perovskite phase to the non-perovskite phase. To improve both phase stability and efficiency without significantly altering the bandgap, some fraction of formamidinium (FA⁺) is introduced into CsPbI₃. This study demonstrates that a quasi-2D perovskite intermediate effectively modulates the crystallization process and improves the film quality of Cs-rich, pure-iodide wide-bandgap perovskites, leading to a significant enhancement in open-circuit voltage (V_OC). Propylphenylammon

SUBMITTER: Kim J 

PROVIDER: S-EPMC12019914 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature