Spatiotemporal Cooling and Diffusion of Hot Interlayer Excitons in Moire-Potential-Suppressed WSe₂/WS₂ Heterostructures.

ABSTRACT: Harnessing hot interlayer excitons (HIEs) in two-dimensional (2D) van der Waals (vdW) heterostructures offers a promising strategy for advancing hot-carrier optoelectronics beyond the Shockley-Queisser limit. However, the spatiotemporal diffusion dynamics and cooling behavior of HIEs remain poorly understood, particularly in transition metal dichalcogenide (TMD) bilayer heterostructures where moiré potentials significantly influence interlayer exciton transport. Here, we investigate a WSe₂/WS₂ bilayer heterostructure with a twist angle of ∼36°, a configuration that effectively suppresses moiré potential. We uncover a linear spatiotemporal diffusion behavior of interlayer excitons under weak moiré conditions─markedly different from the nonlinear dynamics typically obse

SUBMITTER: Wei X 

PROVIDER: S-EPMC12752692 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature