Resonant exciton transfer in mixed-dimensional heterostructures for overcoming dimensional restrictions in optical processes.

ABSTRACT: Nanomaterials exhibit unique optical phenomena, in particular excitonic quantum processes occurring at room temperature. The low dimensionality, however, imposes strict requirements for conventional optical excitation, and an approach for bypassing such restrictions is desirable. Here we report on exciton transfer in carbon-nanotube/tungsten-diselenide heterostructures, where band alignment can be systematically varied. The mixed-dimensional heterostructures display a pronounced exciton reservoir effect where the longer-lifetime excitons within the two-dimensional semiconductor are funneled into carbon nanotubes through diffusion. This new excitation pathway presents several advantages, including larger absorption areas, broadband spectral response, and polarization-independent efficiency.

SUBMITTER: Fang N 

PROVIDER: S-EPMC10710505 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature