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

Yuan, Long; Chung, Ting-Fung; Kuc, Agnieszka; Wan, Yan; Xu, Yang; Chen, Yong P.; Heine, Thomas; Huang, Libai

doi:10.1126/sciadv.1700324

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

Abstract

Efficient interfacial carrier generation in van der Waals heterostructures is critical for their electronic and optoelectronic applications. We demonstrate broadband photocarrier generation in WS₂-graphene heterostructures by imaging interlayer coupling–dependent charge generation using ultrafast transient absorption microscopy. Interlayer charge-transfer (CT) transitions and hot carrier injection from graphene allow carrier generation by excitation as low as 0.8 eV below the WS₂ bandgap. The experimentally determined interlayer CT transition energies are consistent with those predicted from the first-principles band structure calculation. CT interactions also lead to additional carrier generation in the visible spectral range in the heterostructures compared to that in the single-layer WS₂ alone. The lifetime of the charge-separated states is measured to be ~1 ps. These 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.

Authors:

^[1];

^[2];

^[1]; Xu, Yang ^[1];

^[1];

^[2];

^[1]

Purdue Univ., West Lafayette, IN (United States)
Universität Leipzig (Germany); Jacobs University Bremen (Germany)

Publication Date:: Fri Feb 02 00:00:00 EST 2018

Research Org.:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1499923

Grant/Contract Number:: SC0016356

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Science Advances

Additional Journal Information:: Journal Volume: 4; Journal Issue: 2; Journal ID: ISSN 2375-2548

Publisher:: AAAS

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Yuan, Long, Chung, Ting-Fung, Kuc, Agnieszka, Wan, Yan, Xu, Yang, Chen, Yong P., Heine, Thomas, and Huang, Libai. Photocarrier generation from interlayer charge-transfer transitions in WS2-graphene heterostructures.  United States: N. p., 2018. 
        Web.  doi:10.1126/sciadv.1700324.

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                    Yuan, Long, Chung, Ting-Fung, Kuc, Agnieszka, Wan, Yan, Xu, Yang, Chen, Yong P., Heine, Thomas, & Huang, Libai. Photocarrier generation from interlayer charge-transfer transitions in WS2-graphene heterostructures.  United States.  https://doi.org/10.1126/sciadv.1700324

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                    Yuan, Long, Chung, Ting-Fung, Kuc, Agnieszka, Wan, Yan, Xu, Yang, Chen, Yong P., Heine, Thomas, and Huang, Libai. 2018.  
        "Photocarrier generation from interlayer charge-transfer transitions in WS2-graphene heterostructures".  United States.  https://doi.org/10.1126/sciadv.1700324.  https://www.osti.gov/servlets/purl/1499923.

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@article{osti_1499923,

  title        = {Photocarrier generation from interlayer charge-transfer transitions in WS2-graphene heterostructures},

  author       = {Yuan, Long and Chung, Ting-Fung and Kuc, Agnieszka and Wan, Yan and Xu, Yang and Chen, Yong P. and Heine, Thomas and Huang, Libai},

  abstractNote = {Efficient interfacial carrier generation in van der Waals heterostructures is critical for their electronic and optoelectronic applications. We demonstrate broadband photocarrier generation in WS2-graphene heterostructures by imaging interlayer coupling–dependent charge generation using ultrafast transient absorption microscopy. Interlayer charge-transfer (CT) transitions and hot carrier injection from graphene allow carrier generation by excitation as low as 0.8 eV below the WS2 bandgap. The experimentally determined interlayer CT transition energies are consistent with those predicted from the first-principles band structure calculation. CT interactions also lead to additional carrier generation in the visible spectral range in the heterostructures compared to that in the single-layer WS2 alone. The lifetime of the charge-separated states is measured to be ~1 ps. These 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.},

  doi          = {10.1126/sciadv.1700324},

  url          = {https://www.osti.gov/biblio/1499923},
  journal      = {Science Advances},

  issn         = {2375-2548},

  number       = 2,

  volume       = 4,

  place        = {United States},

  year         = {Fri Feb 02 00:00:00 EST 2018},

  month        = {Fri Feb 02 00:00:00 EST 2018}

}

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Fig. 1.: Interlayer coupling–dependent charge transfer from WS₂ to graphene. (A) Atomicmodels of 1L-WS₂/G and 2L-WS₂/G interfaces, with aligned layers. (B) Optical image of the 2L-WS₂/G heterostructure. (C) AFM height image of the 2L-WS₂/G heterostructure. (D) Correlated TAM image of the 2L-WS₂/G heterostructure measured at 0 ps probing the A-excitonmore »

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

Abstract

Citation Formats

Figures / Tables:

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

Generalized Gradient Approximation Made Simple
journal, October 1996

Ultrafast Spatial Imaging of Charge Dynamics in Heterogeneous Polymer Blends
journal, March 2012

Photodetectors based on graphene, other two-dimensional materials and hybrid systems
journal, October 2014

Projector augmented-wave method
journal, December 1994

Hybrid functionals based on a screened Coulomb potential
journal, May 2003

Hybrid Graphene and Graphitic Carbon Nitride Nanocomposite: Gap Opening, Electron–Hole Puddle, Interfacial Charge Transfer, and Enhanced Visible Light Response
journal, February 2012

Scaling of Excitons in Carbon Nanotubes
journal, June 2004

Probing Interlayer Interactions in Transition Metal Dichalcogenide Heterostructures by Optical Spectroscopy: MoS ₂ /WS ₂ and MoSe ₂ /WSe ₂
journal, July 2015

Electron transfer and coupling in graphene–tungsten disulfide van der Waals heterostructures
journal, November 2014

Energy Transfer from Quantum Dots to Graphene and MoS ₂ : The Role of Absorption and Screening in Two-Dimensional Materials
journal, March 2016

From ultrasoft pseudopotentials to the projector augmented-wave method
journal, January 1999

Optical separation of mechanical strain from charge doping in graphene
journal, January 2012

Vertical Heterostructure of Two-Dimensional MoS ₂ and WSe ₂ with Vertically Aligned Layers
journal, January 2015

Quantum Coherence Facilitates Efficient Charge Separation at a MoS ₂ /MoSe ₂ van der Waals Junction
journal, February 2016

Atomically Thin ${MoS}_{2}$ A New Direct-Gap Semiconductor
journal, September 2010

Tuning the electronic structure of monolayer graphene/ $Mo S_{2}$ van der Waals heterostructures via interlayer twist
journal, November 2015

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journal, April 2007

An ab Initio Hartree−Fock Study of the Cubic and Tetragonal Phases of Bulk Tungsten Trioxide
journal, January 1996

Interlayer Exciton Optoelectronics in a 2D Heterostructure p–n Junction
journal, January 2017

Giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
journal, August 2014

Two-dimensional gas of massless Dirac fermions in graphene
journal, November 2005

Vertical 2D Heterostructures
journal, July 2015

Light-emitting diodes by band-structure engineering in van der Waals heterostructures
journal, February 2015

A Perfect Match
journal, February 2012

Ultrafast Carrier Dynamics in Graphite
journal, February 2009

Exciton broadening in WS2 /graphene heterostructures
text, January 2017

Coulomb engineering of the bandgap and excitons in two-dimensional materials
text, January 2017

Photo-thermionic effect in vertical graphene heterostructures
journal, July 2016

Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films
journal, May 2013

Electronic structure of AlFeN films exhibiting crystallographic orientation change from c- to a-axis with Fe concentrations and annealing effect
journal, February 2020

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journal, June 2016

Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
journal, October 1996

Semiconducting Monolayer Materials as a Tunable Platform for Excitonic Solar Cells
journal, October 2012

Direct Observation of Interlayer Hybridization and Dirac Relativistic Carriers in Graphene/MoS ₂ van der Waals Heterostructures
journal, January 2015

Electronic properties of single-layer tungsten disulfide on epitaxial graphene on silicon carbide
journal, January 2017

Equally Efficient Interlayer Exciton Relaxation and Improved Absorption in Epitaxial and Nonepitaxial MoS ₂ /WS ₂ Heterostructures
journal, December 2014

Semiempirical GGA-type density functional constructed with a long-range dispersion correction
journal, January 2006

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journal, May 2021

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text, January 2017

Highly efficient gate-tunable photocurrent generation in vertical heterostructures of layered materials
journal, October 2013

Ground-State Depletion Microscopy: Detection Sensitivity of Single-Molecule Optical Absorption at Room Temperature
journal, November 2010

Interlayer orientation-dependent light absorption and emission in monolayer semiconductor stacks
journal, June 2015

Synthetic Graphene Grown by Chemical Vapor Deposition on Copper Foils
journal, April 2013

Static lattice and electron properties of ${MgCO}_{3}$ (magnesite) calculated by ab initio periodic Hartree-Fock methods
journal, April 1993

Quantum Mechnical Hartree-Fock Study of the Elastic Properties of Li2S and Na2S
journal, May 1993

Observation of Exciton Redshift–Blueshift Crossover in Monolayer WS ₂
journal, June 2017

Experimental observation of two massless Dirac-fermion gases in graphene-topological insulator heterostructure
journal, May 2016

Emerging Photoluminescence in Monolayer MoS₂
journal, April 2010

Electronic transport in graphene-based heterostructures
journal, May 2014

Tuning Interlayer Coupling in Large-Area Heterostructures with CVD-Grown MoS ₂ and WS ₂ Monolayers
journal, May 2014

Efficient hot-electron transfer by a plasmon-induced interfacial charge-transfer transition
journal, August 2015

Population inversion and giant bandgap renormalization in atomically thin WS2 layers
journal, June 2015

Graphene: Status and Prospects
journal, June 2009

Generation of photovoltage in graphene on a femtosecond timescale through efficient carrier heating
journal, April 2015

Picosecond photoresponse in van der Waals heterostructures
journal, October 2015

Coulomb engineering of the bandgap and excitons in two-dimensional materials
journal, May 2017

Interfacial Charge Transfer Circumventing Momentum Mismatch at Two-Dimensional van der Waals Heterojunctions
journal, May 2017

Chemical Vapor Deposition-Derived Graphene with Electrical Performance of Exfoliated Graphene
journal, May 2012

Evidence for Fast Interlayer Energy Transfer in MoSe ₂ /WS ₂ Heterostructures
journal, June 2016

Exciton dynamics and annihilation in WS ₂ 2D semiconductors
journal, January 2015

Seeing Many-Body Effects in Single- and Few-Layer Graphene: Observation of Two-Dimensional Saddle-Point Excitons
journal, January 2011

Quasiparticle band-edge energy and band offsets of monolayer of molybdenum and tungsten chalcogenides
journal, July 2013

Charge Transfer Excitons at van der Waals Interfaces
journal, June 2015

A perfect match?
journal, January 2011

Heterojunctions in 2D semiconductors: A perfect match
journal, December 2014

Two-dimensional crystals-based heterostructures: materials with tailored properties
journal, January 2012

Epitaxial growth of a monolayer WSe2-MoS2 lateral p-n junction with an atomically sharp interface
journal, July 2015

Van der Waals heterostructures
journal, July 2013

Emerging Device Applications for Semiconducting Two-Dimensional Transition Metal Dichalcogenides
journal, January 2014

Photo-Induced Bandgap Renormalization Governs the Ultrafast Response of Single-Layer MoS ₂
journal, December 2015

Two-dimensional atomic crystals
journal, July 2005

Ultrafast charge transfer in atomically thin MoS2/WS2 heterostructures
journal, August 2014

Effect of compression on the electronic, optical and transport properties of MoS ₂ /graphene-based junctions
journal, April 2016

Photo-Induced Bandgap Renormalization Governs the Ultrafast Response of Single-Layer MoS2.
journalarticle, January 2016

Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer ${WS}_{2}$
journal, August 2014

Van der Waals metal-semiconductor junction: Weak Fermi level pinning enables effective tuning of Schottky barrier
journal, April 2016

Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures
journal, February 2015

Graphene photonics and optoelectronics
journal, August 2010

Graphene Photonics and Optoelectronics
text, January 2010