Two-dimensional (2D) materials beyond graphene have drawn a lot of attention recently. Among the large family of 2D materials, transitional metal dichalcogenides (TMDCs), for example, molybdenum disulfides (MoS2) and tungsten diselenides (WSe2), have been demonstrated to be good candidates for advanced electronics, optoelectronics, and other applications. Growth of large single-crystalline doma...

Two-dimensional (2D) van der Waals heterostructures from transition metal dichalcogenide (TMDC) semiconductors show spatially separate excitons with extraordinary properties. The interlayer (XI) have been studied extensively, yet the mechanisms that modulate XI are still not well understood. Here, we introduce several organic-layer-embedded hybrid heterostructures, MoS2/organic/WSe2, to study b...

Transition metal dichalcogenide (TMDC) monolayers exhibit great photocatalytic performances and tunabilities. By using first-principles simulations based on density functional theory, we demonstrate here that external electric bias can be employed to further improve the hydrogen production efficiencies of six AB2 (A = Mo, W B S, Se, Te) TMDC since these are influenced by their piezoelectric res...

Growth of 2D van der Waals layered single-crystal (SC) films is highly desired not only to manifest the intrinsic physical and chemical properties materials, but also enable development unprecedented devices for industrial applications. While wafer-scale SC hexagonal boron nitride film has been successfully grown, an ideal growth platform diatomic transition metal dichalcogenide (TMdC) establis...

The relative strength of different proximity spin-orbit couplings in graphene on transition metal dichalcogenides (TMDC) can be tuned via the composition TMDC layer. While Gr/MoSe$_2$, has a normal gap, to WSe$_2$ instead leads valley-Zeeman-driven inverted bands. Although $\mathbb{Z}_2$ index vanishes, these systems enable concentration-dependent topological crossover with band gap closure whe...