# Hot exciton effect in photoluminescence of monolayer transition metal dichalcogenide

https://mdr.nims.go.jp/datasets/4c0d3fc6-beef-4f92-ae53-180708dab0c0

## File

- [Natural Sciences - 2022 - Xiao - Hot exciton effect in photoluminescence of monolayer transition metal dichalcogenide.pdf](https://mdr.nims.go.jp/filesets/8f7f4343-1c26-431b-9ebb-109752792763/download) ([Detail](https://mdr.nims.go.jp/filesets/8f7f4343-1c26-431b-9ebb-109752792763.md))

## Id

4c0d3fc6-beef-4f92-ae53-180708dab0c0

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-28T06:36:04.322515Z

## Updated at

2025-03-01T03:30:11.480303Z

## Published at

2025-03-01T03:30:12.520693Z

## Doi



## First published url

https://doi.org/10.1002/ntls.20220035

## Date published

2022-11-29

## Recorded date published

2023-1

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Hot exciton effect in photoluminescence of monolayer transition metal dichalcogenide
  title_type: original
  lang: en

## Description

- description: Hot excitons are usually neglected in optical spectroscopy in 2D semiconductors
    for the sake of momentum conservation, as the majority of hot excitons are out
    of light cones. In this letter, we elaborate the contribution of hot excitons
    to optical properties in monolayer transition metal dichalcogenides (TMDs) with
    photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopy. With
    the intensity-dependent PL, temperature-dependent PL and PLE experiments combined
    with the simulations, we experimentally distinguish the influences of the exciton
    temperature and the lattice temperature in the PL spectrum. It is concluded that
    the acoustic phonon assisted photoluminescence accounts for the non-Lorentzian
    high energy tail of the PL spectrum and the hot exciton effect is significant
    even at linear optical properties of TMDs. Besides, the effective exciton temperature
    is found to be several tens of Kelvin higher than the lattice temperature at non-resonant
    optical excitation which may indicate that the exciton temperature needs to be
    carefully taken into account when considering the exciton related strong correlated
    phenomenon such as exciton condensation. Finally, we found the effective exciton
    temperature can be well tuned by excitation energy.
  description_type: abstract
  lang: und

## Creator

- name: Ke Xiao
  role: author
- name: Ruihuan Duan
  role: author
- name: Zheng Liu
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Wang Yao
  role: author
- name: Xiaodong Cui
  role: author

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: Hot excitons
  schema: not_defined
- subject: photoluminescence spectroscopy
  schema: not_defined
- subject: transition metal dichalcogenides
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Natural Sciences
  issn: '26986248'
  volume: '3'
  issue: '1'
  article_number: e20220035

## Conference



## Related item



## Funding

- identifier: '17300520'
  funder_name: Glaucoma Research Foundation

## 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



## Software



## Custom property



## Fileset

- id: 8f7f4343-1c26-431b-9ebb-109752792763
  filename: Natural Sciences - 2022 - Xiao - Hot exciton effect in photoluminescence
    of monolayer transition metal dichalcogenide.pdf
  content_type: application/pdf
  size: 1189230
  md5: ad48ba6676300aa82f58d1c3a692290b

## Thumbnail

fileset_id: 8f7f4343-1c26-431b-9ebb-109752792763
filename: Natural Sciences - 2022 - Xiao - Hot exciton effect in photoluminescence
  of monolayer transition metal dichalcogenide.pdf