# Identification of Exciton Complexes in Charge-Tunable Janus W<sub>Se</sub><sup>S</sup> Monolayers

https://mdr.nims.go.jp/datasets/9696fc06-68d2-4fbe-85f9-90d54ddfcb76

## File

- [acsnano.2c10697.pdf](https://mdr.nims.go.jp/filesets/2fd6fb9c-5c60-424d-81b3-419550f60913/download) ([Detail](https://mdr.nims.go.jp/filesets/2fd6fb9c-5c60-424d-81b3-419550f60913.md))

## Id

9696fc06-68d2-4fbe-85f9-90d54ddfcb76

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-13T07:26:51.261493Z

## Updated at

2025-02-14T03:31:04.805150Z

## Published at

2025-02-14T03:31:04.873025Z

## Doi



## First published url

https://doi.org/10.1021/acsnano.2c10697

## Date published

2023-04-25

## Recorded date published

2023-4-25

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Identification of Exciton Complexes in Charge-Tunable Janus W<sub>Se</sub><sup>S</sup>
    Monolayers
  title_type: original
  lang: en

## Description

- description: Janus transition-metal dichalcogenide mono-layers are fully artificial
    materials, where one plane of chalcogen atoms is replaced by chalco- gen atoms
    of a different type. Theory pre- dicts an in-built out-of-plane electric field,
    giving rise to long-lived, dipolar excitons, while preserv- ing direct-bandgap
    optical transitions in a uni- form potential landscape. Previous Janus studies
    had broad photoluminescence (>15 meV) spectra obfuscating their excitonic origin.
    Here, we identify the neutral, and negatively charged inter- and intravalley exciton
    transitions in Janus WSe monolayer with ∼6 meV optical linewidths. We combine
    a recently developed synthesis technique , with the integration of Janus monolayers
    into vertical heterostructures, allowing doping control. Further, magneto-optic
    measurements indicate that monolayer WSe has a direct bandgap at the K points.
    This work provides the foundation for applications such as nanoscale sensing,
    which relies on resolving excitonic energy shifts, and photo-voltaic energy harvesting,
    which requires efficient creation of long-lived excitons and integra- tion into
    vertical heterostructures.
  description_type: abstract
  lang: und

## Creator

- name: Matthew S. G. Feuer
  role: author
- name: Alejandro R.-P. Montblanch
  role: author
- name: Mohammed Y. Sayyad
  role: author
- name: Carola M. Purser
  role: author
- name: Ying Qin
  role: author
- name: Evgeny M. Alexeev
  role: author
- name: Alisson R. Cadore
  role: author
- name: Barbara L. T. Rosa
  role: author
- name: James Kerfoot
  role: author
- name: Elaheh Mostaani
  role: author
- name: Radosław Kalȩba
  role: author
- name: Pranvera Kolari
  role: author
- name: Jan Kopaczek
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Andrea C. Ferrari
  role: author
- name: Dhiren M. Kara
  role: author
- name: Sefaattin Tongay
  role: author
- name: Mete Atatüre
  role: author

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Janus transition-metal dichalcogenide monolayers
  schema: not_defined
- subject: dipolar excitons
  schema: not_defined
- subject: vertical heterostructures
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: ACS Nano
  issn: 1936086X
  volume: '17'
  issue: '8'
  start_page: 7326
  end_page: 7334

## Conference



## Related item



## Funding

- identifier: EP/K01711X/1
  funder_name: Engineering and Physical Sciences Research Council
- identifier: EP/K017144/1
  funder_name: Engineering and Physical Sciences Research Council
- identifier: EP/L016087/1
  funder_name: Engineering and Physical Sciences Research Council
- identifier: EP/N010345/1
  funder_name: Engineering and Physical Sciences Research Council
- identifier: URF\R1\180593
  funder_name: Royal Society
- funder_name: European Commission
- funder_name: EU Quantum Technology
- identifier: 19H05790
  funder_name: Japan Society for the Promotion of Science
- identifier: 20H00354
  funder_name: Japan Society for the Promotion of Science
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- funder_name: Graphene Flagship
- funder_name: H2020 European Research Council

## Instrument



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## Specimen



## Chemical composition



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## Energy level/transition state



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## Fileset

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  filename: acsnano.2c10697.pdf
  content_type: application/pdf
  size: 3453594
  md5: 2e69b9397bfcc6451032e14491abb843

## Thumbnail

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filename: acsnano.2c10697.pdf