Time-domain observation of interlayer exciton formation and thermalization in a MoSe₂/WSe₂ heterostructure.

ABSTRACT: Vertical heterostructures of transition metal dichalcogenides (TMDs) host interlayer excitons with electrons and holes residing in different layers. With respect to their intralayer counterparts, interlayer excitons feature longer lifetimes and diffusion lengths, paving the way for room temperature excitonic optoelectronic devices. The interlayer exciton formation process and its underlying physical mechanisms are largely unexplored. Here we use ultrafast transient absorption spectroscopy with a broadband white-light probe to simultaneously resolve interlayer charge transfer and interlayer exciton formation dynamics in a MoSe₂/WSe₂ heterostructure. We observe an interlayer exciton formation timescale nearly an order of magnitude (~1 ps) longer than the interlayer char

SUBMITTER: Policht VR 

PROVIDER: S-EPMC10638375 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature