Design principles of spacer cations for suppressing phase segregation in 2D halide perovskites.

ABSTRACT: Suppression of photoinduced halide segregation in mixed halide perovskites remains a significant challenge for their application as wide bandgap semiconductors in solar cells. In addition to stability issues, halide segregation leads to a loss in power conversion efficiency in solar cells and a shift in emission wavelength in light-emitting devices. However, employing low-dimensional halide perovskites, such as two-dimensional (2D) or quasi-2D structures, offers a strategy to mitigate this segregation. Here, we have systematically studied how the molecular structure and binding configuration of spacer cations, ranging from linear alkyl chains to aromatic structures, affect photoinduced halide segregation across both Ruddlesden-Popper (RP) and Dion-Jacobson (DJ) frameworks in 2D mixed halid

SUBMITTER: Min S 

PROVIDER: S-EPMC12536310 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature