Ultrafast long-range spin-funneling in solution-processed Ruddlesden-Popper halide perovskites.

ABSTRACT: Room-temperature spin-based electronics is the vision of spintronics. Presently, there are few suitable material systems. Herein, we reveal that solution-processed mixed-phase Ruddlesden-Popper perovskite thin-films transcend the challenges of phonon momentum-scattering that limits spin-transfer in conventional semiconductors. This highly disordered system exhibits a remarkable efficient ultrafast funneling of photoexcited spin-polarized excitons from two-dimensional (2D) to three-dimensional (3D) phases at room temperature. We attribute this efficient exciton relaxation pathway towards the lower energy states to originate from the energy transfer mediated by intermediate states. This process bypasses the omnipresent phonon momentum-scattering in typical semiconductors with stringent band

SUBMITTER: Giovanni D 

PROVIDER: S-EPMC6671992 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature