Single- and narrow-line photoluminescence in a boron nitride-supported MoSe 2 /graphene heterostructure

  title={Single- and narrow-line photoluminescence in a boron nitride-supported MoSe 2 /graphene heterostructure},
  author={Luis E. Parra L'opez and Loic Moczko and Jan O. Wolff and Aditya Singh and Etienne Lorchat and Michelangelo Romeo and Takashi Taniguchi and Kenji Watanabe and St{\'e}phane Berciaud},
  journal={arXiv: Mesoscale and Nanoscale Physics},
Heterostructures made from van der Waals materials provide a template to investigate proximity effects at atomically sharp heterointerfaces. In particular, near-field charge and energy transfer in heterostructures made from semiconducting transition metal dichalcogenides (TMD) have attracted interest to design model 2D "donor-acceptor" systems and new optoelectronic components. Here, using of Raman scattering and photoluminescence spectroscopies, we report a comprehensive characterization of a… 

Figures from this paper



Charge versus energy transfer in atomically-thin graphene-transition metal dichalcogenide van der Waals heterostructures

Van der Waals heterostuctures, made from stacks of two-dimensional materials, exhibit unique light-matter interactions and are promising for novel optoelectronic devices. The performance of such

Interplay of charge transfer and disorder in optoelectronic response in Graphene/hBN/MoS2 van der Waals heterostructures

Strong optoelectronic response in the binary van der Waals heterostructures of graphene and transition metal dichalcogenides (TMDCs) is an emerging route towards high-sensitivity light sensing. While

Ultrahigh-Gain Photodetectors Based on Atomically Thin Graphene-MoS2 Heterostructures

It is demonstrated that a photodetector based on the graphene/MoS2 heterostructure is able to provide a high photogain greater than 108 and graphene is transferable onto MoS2.

Excitonic linewidth approaching the homogeneous limit in MoS2-based van der Waals heterostructures

The strong light-matter interaction and the valley selective optical selection rules make monolayer (ML) MoS[subscript 2] an exciting 2D material for fundamental physics and optoelectronics

Filtering the photoluminescence spectra of atomically thin semiconductors with graphene

It is shown that graphene, directly stacked onto TMD monolayers, enables single and narrow-line photoluminescence arising solely from TMD neutral excitons, which establishes TMD/graphene heterostructures as a unique set of optoelectronic building blocks that are suitable for electroluminescent systems emitting visible and near-infrared photons at near THz rate with linewidths approaching the homogeneous limit.

Determination of band offsets, hybridization, and exciton binding in 2D semiconductor heterostructures

The key unknown parameters in MoSe2/WSe2 heterobilayers are determined by using rational device design and submicrometer angle-resolved photoemission spectroscopy (μ-ARPES) in combination with photoluminescence and the spectrum of a rotationally aligned heterobilayer reflects a mixture of commensurate and incommensurate domains.

Approaching the intrinsic photoluminescence linewidth in transition metal dichalcogenide monolayers

Excitonic states in monolayer transition metal dichalcogenides (TMDCs) have been the subject of extensive recent interest. Their intrinsic properties can, however, be obscured due to the influence of

Room-Temperature Valley Polarization and Coherence in Transition Metal Dichalcogenide–Graphene van der Waals Heterostructures

Van der Waals heterostructures made of graphene and transition metal dichalcogenides (TMD) are an emerging platform for opto-electronic, -spintronic and -valleytronic devices that could benefit from

Electrical control of neutral and charged excitons in a monolayer semiconductor.

This work reports the unambiguous observation and electrostatic tunability of charging effects in positively charged, neutral and negatively charged excitons in field-effect transistors via photoluminescence and finds the charging energies for X(+) and X(-) to be nearly identical implying the same effective mass for electrons and holes.

Photocarrier generation from interlayer charge-transfer transitions in WS2-graphene heterostructures

The results suggest that interlayer interactions make graphene–two-dimensional semiconductor heterostructures very attractive for photovoltaic and photodetector applications because of the combined benefits of high carrier mobility and enhanced broadband photocarrier generation.