In-Plane Field Enabled Dissociation Dynamics of Defect-Bound Excitons and Excitonic Oscillator Strength Redistribution in Monolayer WS<sub>2</sub>.
basic_science · Level V
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- Record sourced from PubMed, PMID 40500884.
- Also identified by DOI 10.1021/acsnano.5c02314.
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Abstract
Monolayer transition metal dichalcogenides (TMDs) host strongly bound many-particle excitonic complexes, providing a rich platform to develop insights into the intriguing questions related to many-body physics and light-matter interactions in quantum-confined 2D semiconductors. This work explores monolayer WS<sub>2</sub>, demonstrating how an in-plane electric field can dynamically redistribute oscillator strength among various excitonic states─from trions, charged biexcitons, and defect-bound (localized) excitons to neutral excitons. This field-induced redistribution unveils complex exciton-defect interactions and coupling mechanisms, elucidating their role in modulating many-body interactions and tuning the optoelectronic properties of the material. The observations contribute to understanding light-matter interactions in quantum-confined systems, with relevance to future tunable photonic devices and quantum information technology applications.