# Gate-Tunable Hot Electron Extraction in a Two-Dimensional Semiconductor Heterojunction

https://mdr.nims.go.jp/datasets/0d2acc03-4141-4659-b800-9ecf7aa401fd

## File

- [2025A00613G_manuscript_0407_xcr_yt.pdf](https://mdr.nims.go.jp/filesets/a143a67d-22c6-4c78-86ee-323aaae4e572/download) ([Detail](https://mdr.nims.go.jp/filesets/a143a67d-22c6-4c78-86ee-323aaae4e572.md))

## Id

0d2acc03-4141-4659-b800-9ecf7aa401fd

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-01T07:26:53.706517Z

## Updated at

2026-07-06T04:40:18.325613Z

## Published at

2026-07-06T07:27:57.289915Z

## Doi



## First published url

https://doi.org/10.1021/acs.nanolett.4c06416

## Date published

2025-04-30

## Recorded date published

2025-4-30

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Gate-Tunable Hot Electron Extraction in a Two-Dimensional Semiconductor Heterojunction
  title_type: original
  lang: en

## Description

- description: Hot carrier solar cells (HCSCs), harvesting the excess energy of hot
    carriers generated by above-band gap photoexcitation, are crucial for pushing
    the solar cell efficiency beyond the Shockley–Queisser limit, which is challenging
    to realize mainly due to fast hot-carrier cooling. By performing transient reflectance
    spectroscopy in a MoSe2/hBN/WS2 junction, we demonstrate the gate-tunable harvest
    of hot electrons from MoSe2 to WS2. By spectrally distinguishing hot-electron
    extraction from lattice temperature increase, we find that electrostatically doped
    electrons in MoSe2 can boost hot-electron extraction density (nET) by a factor
    up to several tens. Such enhancement arises from the interaction between hot excitons
    and doped electrons, which converts the excess energy of hot excitons to excitations
    of the Fermi sea and hence generates hot electrons. Moreover, nET can be further
    enhanced by reducing the conduction band offset with an external electric field.
    Our results provide in-depth insights into the design of HCSCs with electrostatic
    strategies.
  description_type: abstract
  lang: en

## Creator

- name: Chenran Xu
  role: author
  orcid: https://orcid.org/0009-0002-1962-6532
- name: Chen Xu
  role: author
- name: Jichen Zhou
  role: author
- name: Zhexu Shan
  role: author
- name: Wenjian Su
  role: author
- name: Wenbing Li
  role: author
- name: Xingqi Xu
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
- name: Shiyao Zhu
  role: author
- name: Dawei Wang
  role: author
- name: Yanhao Tang
  role: author
  orcid: https://orcid.org/0000-0002-0840-8305

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Hot carrier solar cells
  schema: not_defined
- subject: Transient reflectance spectroscopy
  schema: not_defined
- subject: MoSe2/WS2 junction
  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.4c06416.
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2025-04-21
end_date: 2026-04-21

## Journal

- title: Nano Letters
  issn: '15306984'
  volume: '25'
  issue: '17'
  start_page: 6872
  end_page: 6878

## Conference



## Related item



## Funding



## 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: a143a67d-22c6-4c78-86ee-323aaae4e572
  filename: 2025A00613G_manuscript_0407_xcr_yt.pdf
  content_type: application/pdf
  size: 7190506
  md5: 7b60c38019dd6d03528ce3338742309a

## Thumbnail

fileset_id: a143a67d-22c6-4c78-86ee-323aaae4e572
filename: 2025A00613G_manuscript_0407_xcr_yt.pdf