Abstract
In heterobilayers consisting of different transition-metal
dichalcogenide (TMDC) monolayers, optically excited electron-hole pairs
can be spatially separated into the adjacent layers due to a type-II
band alignment. However, they remain Coulomb correlated and form
interlayer excitons (ILEs), which recombine radiatively. While these
ILEs are observed in several TMDC material combinations, their
characters and properties depend on the specific system. Herein, some of
these peculiarities are demonstrated by comparing studies performed on
two different heterobilayer combinations: MoS2-WSe2 and MoSe2-WSe2.
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