Giant Light Emission Enhancement in Strain-Engineered InSe/MS₂ (M = Mo or W) van der Waals Heterostructures.

ABSTRACT: Two-dimensional (2D) heterostructures (HSs) offer unlimited possibilities for playing with layer number, order, and twist angle. The realization of high-performance optoelectronic devices, however, requires the achievement of specific band alignments, k-space matching between conduction and valence band extrema, and efficient charge transfer between the constituent layers. Fine-tuning mechanisms to design ideal HSs are lacking. Here, we show that layer-selective strain engineering can be exploited as an extra degree of freedom to tailor the band alignment and optical properties of 2D HSs. To that end, strain is selectively applied to MS₂ (M = Mo or W) monolayers in InSe/MS₂ HSs, triggering a giant photoluminescence enhancement of the highly tunable but weakly e

SUBMITTER: Blundo E 

PROVIDER: S-EPMC11887447 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature