Electrical control of near-field energy transfer between quantum dots and 2D semiconductors

Abstract

We investigate near-field energy transfer between chemically synthesized quantum dots (QDs) and two-dimensional semiconductors. We fabricate devices in which electrostatically gated semiconducting monolayer molybdenum disulfide (MoS2) is placed atop a homogenous self-assembled layer of core-shell CdSSe QDs. We demonstrate efficient non-radiative Förster resonant energy transfer (FRET) from QDs into MoS2 and prove that modest gate-induced variation in the excitonic absorption of MoS2 lead to large (~500%) changes in the FRET rate. This, in turn, allows for up to ~75% electrical modulation of QD photoluminescence intensity. The hybrid QD/MoS2 devices operate within a small voltage range, allow for continuous modification of the QD photoluminescence intensity, and can be used for selective tuning of QDs emitting in the visible-IR range.

arXiv comment19 Pages, 11 figures. Main text and supporting information. Nano Letters, 2015, Article ASAP

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Cited by in corpus (10)

• Evidence for Fast Interlayer Energy Transfer in MoSe2/WS2 Heterostructures
• Suppressing Diffusion-Mediated Exciton Annihilation in 2D Semiconductors Using the Dielectric Environment
• Electrical control of lifetime-limited quantum emitters using 2D materials
• Ultrafast Charge Transfer at a Quantum Dot/2D Materials Interface Probed by Second Harmonic Generation
• Exciton-photon interactions in semiconductor nanocrystals: {radiative transitions, non-radiative processes,} and environment effects
• Exciton-polaritons in transition-metal dichalcogenides and their direct excitation via energy transfer
• Interface-Confined Doubly Anisotropic Oxidation of Two-Dimensional MoS2
• Impact of dark excitons on Förster type resonant energy transfer between dye molecules and atomically thin semiconductors
• Voltage-Controlled Reversible Modulation of Colloidal Quantum Dot Thin Film Photoluminescence
• Contactless photo-induced carrier density control in nanocrystal MoS2 hybrids