Mechanistic Insight into Tunable Spin Relaxation in Two-Dimensional Type-II Ligand-Perovskite Heterostructures.

ABSTRACT: Two-dimensional (2D) metal-halide perovskites with spin-dependent optical properties hold great promise for spintronic and quantum applications. However, their spin lifetimes, especially for n = 1 2D perovskites, are typically limited to subpicosecond time scales due to rapid spin relaxation driven by strong spin-orbit coupling (SOC), electron-hole exchange interactions, and phonon-mediated scattering. Here, we demonstrate that type-II ligand-perovskite heterostructures overcome these constraints by reducing electron-hole wave function overlap and exciton binding energy. Compared to the type-I 2D perovskite (PEA)₂PbI₄ with a spin lifetime of 0.29 ps at room temperature, our engineered type-II systems achieve substantially extended spin lifetimes, ∼6.37 ps for (

SUBMITTER: Soni A 

PROVIDER: S-EPMC12616697 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature