Ki Wook Kim

TL;DR: Direct measurements of valley relaxation dynamics in single layer MoS2 are reported by using ultrafast transient absorption spectroscopy, showing that strong Coulomb interactions significantly impact valley population dynamics and biexcitons form with more than an order of magnitude larger binding energy compared to conventional semiconductors.

TL;DR: In this article, the intrinsic electrical transport properties of monolayer silicene and MoS were investigated from first principles, based on the first principles of the first principle of first principles.

TL;DR: In this article, the intrinsic electron and hole-phonon interactions were investigated in monolayer transition-metal dichalcogenides based on a density functional theory formalism.

TL;DR: In this article, the authors demonstrate that 2D MoS2/WS2 heterostructures can enable equally efficient interlayer exciton relaxation regardless the epitaxy and orientation of the stacking.

TL;DR: This result indicates that 2D heterostructures bear significant implications for the development of photonic devices, in particular those requesting efficient exciton separation and strong light absorption, such as solar cells, photodetectors, modulators, and photocatalysts, and suggests that the simple stacking of dissimilar 2D materials with random orientations is a viable strategy to fabricate complex functional 2Dheterostructure.