# Exciton Dynamics in Janus WSSe Driven by Structural Asymmetry

https://mdr.nims.go.jp/datasets/6ee13ed5-b1d5-4ba5-87de-dec3a4613459

## File

- [2025A01133G_Erkilic_Exciton Dynamics in Janus WSSe Driven by Structural Asymmetry_accepted.pdf](https://mdr.nims.go.jp/filesets/bb0e24a0-0fde-4bd2-80fc-bdd48718f6e5/download) ([Detail](https://mdr.nims.go.jp/filesets/bb0e24a0-0fde-4bd2-80fc-bdd48718f6e5.md))

## Id

6ee13ed5-b1d5-4ba5-87de-dec3a4613459

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-27T02:43:58.745158Z

## Updated at

2026-07-29T02:26:28.479394Z

## Published at

2026-07-31T23:29:11.311923Z

## Doi



## First published url

https://doi.org/10.1021/acs.nanolett.5c02436

## Date published

2025-08-13

## Recorded date published

2025-8-13

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Exciton Dynamics in Janus WSSe Driven by Structural Asymmetry
  title_type: original
  lang: en

## Description

- description: Artificially engineered Janus transition metal dichalcogenides (TMDCs)
    feature distinct chalcogen atoms on their top and bottom layers that break mirror
    symmetry, which is expected to alter the exciton dynamics and exciton–phonon interactions.
    Here, we present direct experimental evidence of the dipolar nature of excitons
    in high-quality Janus WSSe monolayers. Spatial imaging of exciton emission reveals
    that the exciton diffusion length in Janus WSSe is almost twice that of WS2, which
    is attributed to electron–hole spatial separation induced by the intrinsic out-of-plane
    electric field. Furthermore, temperature-dependent photoluminescence measurements
    indicate significantly enhanced excitonic line width broadening of WSSe above
    100 K, arising from stronger exciton–phonon scattering via additional optical
    phonons. These findings highlight the pivotal role of intrinsic structural asymmetry
    in governing radiative and nonradiative processes in Janus TMDCs and offer insights
    into their potential for excitonic device applications.
  description_type: abstract
  lang: en

## Creator

- name: Ufuk Erkılıç
  role: author
- name: Shengnan Wang
  role: author
- name: Yoshiaki Sekine
  role: author
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Yoshitaka Taniyasu
  role: author

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Janus transition metal dichalcogenide (TMDC)
  schema: not_defined
- subject: Exciton diffusion
  schema: not_defined
- subject: Exciton-phonon interaction
  schema: not_defined

## Rights

- description: This document is the Accepted Manuscript version of a Published Article
    that appeared in final form in Nano Letters, copyright © 2025 American Chemical
    Society. To access the final published article, see https://doi.org/10.1021/acs.nanolett.5c02436.
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2025-08-01
end_date: 2026-08-01

## Journal

- title: Nano Letters
  issn: '15306984'
  volume: '25'
  issue: '32'
  start_page: 12193
  end_page: 12200

## Conference



## Related item



## Funding

- identifier: JPMJCR24A5
  funder_name: Core Research for Evolutional Science and Technology
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: Japan Society for the Promotion of Science

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Custom property



## Fileset

- id: bb0e24a0-0fde-4bd2-80fc-bdd48718f6e5
  filename: 2025A01133G_Erkilic_Exciton Dynamics in Janus WSSe Driven by Structural
    Asymmetry_accepted.pdf
  content_type: application/pdf
  size: 21610280
  md5: a2b77548f275213284407f458fe6f6d7

## Thumbnail

fileset_id: bb0e24a0-0fde-4bd2-80fc-bdd48718f6e5
filename: 2025A01133G_Erkilic_Exciton Dynamics in Janus WSSe Driven by Structural
  Asymmetry_accepted.pdf