Abstract

Localized light emission from monolayer MoSe₂ nanodots embedded in monolayer WSe₂ matrices was directly resolved by cryogenic cathodoluminescence in a scanning transmission electron microscope. The emission depends strongly on nanodot size: large dots emit MoSe₂ excitons, intermediate dots emit interface excitons, and very small dots show a blue-shifted quantized interface-exciton emission, demonstrating quantum confinement in two-dimensional in-plane heterostructures.

Abstract

Localized light emission from monolayer MoSe₂ nanodots embedded in monolayer WSe₂ matrices was directly resolved by cryogenic cathodoluminescence in a scanning transmission electron microscope. The emission depends strongly on nanodot size: large dots emit MoSe₂ excitons, intermediate dots emit interface excitons, and very small dots show a blue-shifted quantized interface-exciton emission, demonstrating quantum confinement in two-dimensional in-plane heterostructures.

Abstract

Localized light emission from monolayer MoSe₂ nanodots embedded in monolayer WSe₂ matrices was directly resolved by cryogenic cathodoluminescence in a scanning transmission electron microscope. The emission depends strongly on nanodot size: large dots emit MoSe₂ excitons, intermediate dots emit interface excitons, and very small dots show a blue-shifted quantized interface-exciton emission, demonstrating quantum confinement in two-dimensional in-plane heterostructures.

Abstract

Localized light emission from monolayer MoSe₂ nanodots embedded in monolayer WSe₂ matrices was directly resolved by cryogenic cathodoluminescence in a scanning transmission electron microscope. The emission depends strongly on nanodot size: large dots emit MoSe₂ excitons, intermediate dots emit interface excitons, and very small dots show a blue-shifted quantized interface-exciton emission, demonstrating quantum confinement in two-dimensional in-plane heterostructures.