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Title: Coulomb engineering of the bandgap and excitons in two-dimensional materials

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms15251· OSTI ID:1360901
 [1];  [2];  [3];  [3];  [4];  [4];  [5];  [6];  [6];  [6]; ORCiD logo [3];  [3];  [3];  [1];  [3];  [7]
  1. Columbia Univ., New York, NY (United States); Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Columbia Univ., New York, NY (United States); Univ. Federal do Ceara, Fortaleza (Brazil)
  3. Columbia Univ., New York, NY (United States)
  4. Columbia Univ., New York, NY (United States); Stanford Univ., Stanford, CA (United States)
  5. Univ. of Chicago, Chicago, IL (United States)
  6. Univ. of Regensburg, Regensburg (Germany)
  7. Columbia Univ., New York, NY (United States); Univ. of Regensburg, Regensburg (Germany)

Here, the ability to control the size of the electronic bandgap is an integral part of solid-state technology. Atomically thin two-dimensional crystals offer a new approach for tuning the energies of the electronic states based on the unusual strength of the Coulomb interaction in these materials and its environmental sensitivity. Here, we show that by engineering the surrounding dielectric environment, one can tune the electronic bandgap and the exciton binding energy in monolayers of WS2 and WSe2 by hundreds of meV. We exploit this behaviour to present an in-plane dielectric heterostructure with a spatially dependent bandgap, as an initial step towards the creation of diverse lateral junctions with nanoscale resolution.

Research Organization:
SLAC National Accelerator Lab. (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1360901
Journal Information:
Nature Communications, Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 481 works
Citation information provided by
Web of Science

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Cited By (93)

Modulating Blue Phosphorene by Synergetic Codoping: Indirect to Direct Gap Transition and Strong Bandgap Bowing journal January 2019
Rapid Biofilm Elimination on Bone Implants Using Near‐Infrared‐Activated Inorganic Semiconductor Heterostructures journal August 2019
Tuning Excitonic Properties of Pure and Mixed Halide Perovskite Thin Films via Interfacial Engineering journal June 2018
MoS 2 and Perylene Derivative Based Type‐II Heterostructure: Bandgap Engineering and Giant Photoluminescence Enhancement journal December 2019
Effect of Dielectric Environment on Excitonic Dynamics in Monolayer WS 2 journal September 2019
Preserving the Emission Lifetime and Efficiency of a Monolayer Semiconductor upon Transfer journal April 2019
Structural, Spectroscopic, and Excitonic Dynamic Characterization in Atomically Thin Yb 3+ ‐Doped MoS 2 , Fabricated by Femtosecond Pulsed Laser Deposition journal September 2019
Enhancements of Light Absorbability, Optical Conductivity, and Terahertz Cutoff Frequency in Stacked Layers of Selenium via Ag Nanoslabs Sandwiching journal August 2019
Refractive Index Dispersion of Hexagonal Boron Nitride in the Visible and Near‐Infrared journal October 2018
Screening Effect of Ultrathin Gold Films on Excitons in Monolayer WS2 journal January 2019
Optical control of room-temperature valley polaritons journal July 2017
Exciton fission in monolayer transition metal dichalcogenide semiconductors journal October 2017
Diversity of trion states and substrate effects in the optical properties of an MoS2 monolayer journal December 2017
Two-dimensional semiconductors in the regime of strong light-matter coupling journal July 2018
Nanoscale mapping of quasiparticle band alignment journal July 2019
Revealing exciton masses and dielectric properties of monolayer semiconductors with high magnetic fields journal September 2019
Electron quantum metamaterials in van der Waals heterostructures journal November 2018
Dielectric disorder in two-dimensional materials journal August 2019
Momentum-space indirect interlayer excitons in transition-metal dichalcogenide van der Waals heterostructures journal April 2018
Observation of moiré excitons in WSe2/WS2 heterostructure superlattices journal February 2019
Exciton physics and device application of two-dimensional transition metal dichalcogenide semiconductors journal September 2018
A dielectric-defined lateral heterojunction in a monolayer semiconductor journal February 2019
Tailoring exciton dynamics of monolayer transition metal dichalcogenides by interfacial electron-phonon coupling journal September 2019
Ultrafast free carrier dynamics in black phosphorus–molybdenum disulfide (BP/MoS 2 ) heterostructures journal January 2019
Two-dimensional black phosphorous induced exciton dissociation efficiency enhancement for high-performance all-inorganic CsPbI 3 perovskite photovoltaics journal January 2019
Dual-source vacuum deposition of pure and mixed halide 2D perovskites: thin film characterization and processing guidelines journal January 2020
Imaging microscopic electronic contrasts at the interface of single-layer WS 2 with oxide and boron nitride substrates journal April 2019
Electric-field-induced optical hysteresis in single-layer WSe 2 journal October 2019
Upconversion photoluminescence by charge transfer in a van der Waals trilayer journal October 2019
Impact of substrate induced band tail states on the electronic and optical properties of MoS 2 journal December 2019
Self-energy effect and Coulomb potential modulation of the exciton in monolayer MoS 2 on polar substrate journal October 2017
Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum journal March 2019
Dependence of the magnetic interactions in MoS 2 monolayer on Mn-doping configurations journal August 2019
Singlet and triplet trions in WS 2 monolayer encapsulated in hexagonal boron nitride journal June 2018
The impact of hexagonal boron nitride encapsulation on the structural and vibrational properties of few layer black phosphorus journal February 2019
Direct determination of monolayer MoS 2 and WSe 2 exciton binding energies on insulating and metallic substrates journal January 2018
Band-bending induced by charged defects and edges of atomically thin transition metal dichalcogenide films journal June 2018
Multimodal spectromicroscopy of monolayer WS 2 enabled by ultra-clean van der Waals epitaxy journal July 2018
Interlayer screening effects in WS 2 /WSe 2 van der Waals hetero-bilayer journal August 2018
Dielectric impact on exciton binding energy and quasiparticle bandgap in monolayer WS 2 and WSe 2 journal March 2019
Lithographically defined synthesis of transition metal dichalcogenides journal September 2019
Gate-tunable flat bands in van der Waals patterned dielectric superlattices journal December 2019
Scanning tunneling spectroscopy of MoS 2 monolayer in presence of ethanol gas journal April 2018
Direct observation of giant binding energy modulation of exciton complexes in monolayer MoS e 2 journal August 2017
Exciton broadening in WS 2 /graphene heterostructures journal November 2017
Important role of screening the electron-hole exchange interaction for the optical properties of molecules near metal surfaces journal January 2019
Direct Determination of Band-Gap Renormalization in the Photoexcited Monolayer MoS 2 journal June 2019
Engineering of optical and electronic band gaps in transition metal dichalcogenide monolayers through external dielectric screening journal October 2017
Highly efficient hot electron harvesting from graphene before electron-hole thermalization journal November 2019
Nanophotonics with 2D transition metal dichalcogenides [Invited] journal January 2018
High-efficiency energy transfer in perovskite heterostructures journal January 2018
Modulating Blue Phosphorene by Synergetic Codoping: Indirect to Direct Gap Transition and Strong Bandgap Bowing journal March 2021
Dynamics of Free and Localized Excitons in Two‐Dimensional Transition Metal Dichalcogenides journal February 2019
Charge‐Accumulation Effect in Transition Metal Dichalcogenide Heterobilayers journal August 2019
Resonant optical Stark effect in monolayer WS2 journal December 2019
Ultra-thin van der Waals crystals as semiconductor quantum wells journal January 2020
Exciton Relaxation Cascade in two-dimensional Transition Metal Dichalcogenides journal May 2018
Demonstration of the key substrate-dependent charge transfer mechanisms between monolayer MoS2 and molecular dopants journal September 2019
Restoring the intrinsic optical properties of CVD-grown MoS 2 monolayers and their heterostructures journal January 2019
Theoretical investigation of the vertical dielectric screening dependence on defects for few-layered van der Waals materials journal January 2019
Impact of photodoping on inter- and intralayer exciton emission in a MoS 2 /MoSe 2 /MoS 2 heterostructure journal August 2018
Charged excitons in two-dimensional transition metal dichalcogenides: Semiclassical calculation of Berry curvature effects journal September 2019
Exciton routing in the heterostructure of a transition metal dichalcogenide monolayer on a paraelectric substrate journal October 2019
Noninvasive control of excitons in two-dimensional materials journal July 2017
Radiative lifetime of localized excitons in transition-metal dichalcogenides journal November 2018
Rigid Band Shifts in Two-Dimensional Semiconductors through External Dielectric Screening journal November 2019
Photocarrier generation from interlayer charge-transfer transitions in WS 2 -graphene heterostructures journal February 2018
Giant gate-tunable bandgap renormalization and excitonic effects in a 2D semiconductor journal July 2019
Momentum-space indirect interlayer excitons in transition-metal dichalcogenide van der Waals heterostructures text January 2018
Exciton broadening in WS2 /graphene heterostructures text January 2017
Reliable Synthesis of Large-Area Monolayer WS 2 Single Crystals, Films, and Heterostructures with Extraordinary Photoluminescence Induced by Water Intercalation journal March 2018
Facile synthesis of thin black TiO2 − x nanosheets with enhanced lithium-storage capacity and visible light photocatalytic hydrogen production journal January 2019
Visualizing electrostatic gating effects in two-dimensional heterostructures journal July 2019
Polariton hyperspectral imaging of two-dimensional semiconductor crystals journal September 2019
Magneto-spectroscopy of exciton Rydberg states in a CVD grown WSe 2 monolayer journal June 2019
Probing interlayer excitons in a vertical van der Waals p-n junction using a scanning probe microscopy technique journal January 2019
Comparative study of the exciton binding energies of thin and ultrathin organic-inorganic perovskites due to dielectric mismatch effects journal July 2017
Polariton hyperspectral imaging of two-dimensional semiconductor crystals text January 2019
Experimental observation of a negative grey trion in an electron-rich WSe 2 monolayer text January 2019
Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum text January 2018
Singlet and triplet trions in WS$_2$ monolayer encapsulated in hexagonal boron nitride text January 2018
Momentum-space indirect interlayer excitons in transition metal dichalcogenide van der Waals heterostructures text January 2018
Radiative lifetime of localized excitons in transition metal dichalcogenides text January 2018
Two-dimensional semiconductors in the regime of strong light-matter coupling text January 2018
Charged exctions in two-dimensional transition-metal dichalcogenides - semiclassical calculation of Berry-curvature effects text January 2018
Imaging microscopic electronic contrasts at the interface of single-layer WS$_2$ with oxide and boron nitride substrates text January 2019
Intrinsic Lifetime of Higher Excitonic States in Tungsten Diselenide Monolayers text January 2019
Gate-tunable flat bands in van der Waals patterned dielectric superlattices text January 2019
Dependence of the magnetic interactions in MoS$_2$ monolayer on Mn-doping configurations text January 2019
Morphology Control of Epitaxial Monolayer Transition Metal Dichalcogenides text January 2019
Ultra-thin van der Waals crystals as semiconductor quantum wells text January 2019
The impact of hexagonal boron nitride encapsulation on the structural and vibrational properties of few layer black phosphorus text January 2020
Colloquium : Excitons in atomically thin transition metal dichalcogenides text January 2018

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