Reduced dielectric screening and enhanced energy transfer in single and few-layer MoS2
arXiv:1408.1501 · doi:10.1021/nl5019386
Abstract
We report highly efficient non-radiative energy transfer from cadmium selenide (CdSe) quantum dots to monolayer and few-layer molybdenum disulfide (MoS2). The quenching of the donor quantum dot photoluminescence increases as the MoS2 flake thickness decreases, with the highest efficiency (>95%) observed for monolayer MoS2. This counterintuitive result arises from reduced dielectric screening in thin layer semiconductors having unusually large permittivity and a strong in-plane transition dipole moment, as found in MoS2. Excitonic energy transfer between a 0D emitter and a 2D absorber is fundamentally interesting and enables a wide range of applications including broadband optical down-conversion, optical detection, photovoltaic sensitization, and color shifting in light-emitting devices.
14 pages, 4 figures
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Cited by in corpus (18)
- Electronic Transport in Two-Dimensional Materials
- Evidence for Fast Interlayer Energy Transfer in MoSe2/WS2 Heterostructures
- Revealing Strong Plasmon-Exciton Coupling Between Nano-gap Resonators and Two-Dimensional Semiconductors at Ambient Conditions
- Electrical control of near-field energy transfer between quantum dots and 2D semiconductors
- Charge versus energy transfer in atomically-thin graphene-transition metal dichalcogenide van der Waals heterostructures
- Suppressing Diffusion-Mediated Exciton Annihilation in 2D Semiconductors Using the Dielectric Environment
- 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
- Near-field relaxation of a quantum emitter to 2D semiconductors: surface dissipation and exciton polaritons
- Exciton-polaritons in transition-metal dichalcogenides and their direct excitation via energy transfer
- Non-Markovian spontaneous emission dynamics of a quantum emitter near a MoS nanodisk
- Hybrid quantum dot-tin disulfide field-effect transistors with improved photocurrent and spectral responsivity
- Controlled integration of MoS2 flakes on nanopores by means of electrophoretic deposition
- Spectral focusing of broadband silver electroluminescence in nanoscopic FRET-LEDs
- Optical spectroscopy of interlayer coupling in artificially stacked MoS2 layers
- Resonant exciton transfer in mixed-dimensional heterostructures for overcoming dimensional restrictions in optical processes
- Exciton-polaritons of a 2D semiconductor layer in a cylindrical microcavity
- Resonance Raman scattering and ab initio calculation of electron energy loss spectra of MoS2 nanosheets