# Photovoltaic Device Based on Monolayer Compositionally Graded Transition Metal Dichalcogenide Alloy

https://mdr.nims.go.jp/datasets/475b3655-3251-402a-a847-5aea70769ca0

## File

- [Small Methods - 2026 - Ou - Photovoltaic Device Based on Monolayer Compositionally Graded Transition Metal Dichalcogenide.pdf](https://mdr.nims.go.jp/filesets/52da0568-50bd-413c-aacc-2179db2d8d29/download) ([Detail](https://mdr.nims.go.jp/filesets/52da0568-50bd-413c-aacc-2179db2d8d29.md))

## Id

475b3655-3251-402a-a847-5aea70769ca0

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-06-09T02:48:46.691378Z

## Updated at

2026-06-09T04:13:54.903622Z

## Published at

2026-06-09T06:25:41.907348Z

## Doi



## First published url

https://doi.org/10.1002/smtd.202501997

## Date published

2026-02-12

## Recorded date published

2026-3

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Photovoltaic Device Based on Monolayer Compositionally Graded Transition
    Metal Dichalcogenide Alloy
  title_type: original
  lang: en

## Description

- description: Monolayer transition metal dichalcogenides (TMDCs) have been widely
    studied for the fabrication of photovoltaic devices with high energy conversion
    efficiencies for future ultrathin optoelectronic devices. To create efficient
    photovoltaic devices, in-plane heterostructures, whose composition can be artificially
    tailored by chemical vapor deposition, are a promising approach to form p-n junctions
    spontaneously. Although sharp in-plane heterostructures are typically employed,
    their narrow heterointerfaces are prone to defect sensitivity and thermal losses,
    which can significantly reduce device performance. In this study, we demonstrated
    that the spontaneous p-n junction devices fabricated based on chemically synthesized
    compositionally graded monolayer WS2xSe2(1-x) alloys exhibited enhanced photoresponse
    performance. By conducting photocurrent and photoluminescence mappings, we revealed
    the correlation between the photocurrent generation behavior and local composition
    gradient. Moreover, the monolayer alloy device exhibited an open-circuit voltage
    as high as 0.66 V, highlighting the potential of a compositionally graded p-n
    junction for high-efficiency photovoltaic devices. Our study presents a new approach
    for the development of efficient TMDC-based optoelectronic devices.
  description_type: abstract
  lang: und

## Creator

- name: Hao Ou
  role: author
- name: Sota Tsukamoto
  role: author
- name: Tenta Kitamura
  role: author
- name: Motoki Matsuno
  role: author
- name: Koshi Oi
  role: author
- name: Togo Takahashi
  role: author
- name: Takahiko Endo
  role: author
- name: Yasumitsu Miyata
  role: author
  orcid: https://orcid.org/0000-0002-9733-5119
- name: Jiang Pu
  role: author
  orcid: https://orcid.org/0000-0002-1676-2072
- name: Taishi Takenobu
  role: author
  orcid: https://orcid.org/0000-0001-7313-6396

## Contact agent



## Publisher

organization: Wiley
ror: https://ror.org/

## Managing organization



## Keyword

- subject: Transition Metal Dichalcogenide
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Small Methods
  issn: '23669608'
  volume: '10'
  issue: '5'
  article_number: e01997

## Conference



## Related item



## Funding

- funder_name: Core Research for Evolutional Science and Technology
- identifier: JP20H05867, JP20H05664, JP21H05232, JP21H05234, JP21H05236, JP22H00280,
    JP22H01899, JP22H04957, JP22K19059, JP22H01899, JP24H00044, and JP25K17908
  funder_name: JSPS
- identifier: JPMJCR23A4, JPMJCR23O3, JPMJFR223Z and JPMJFR213X
  funder_name: JST

## 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: 52da0568-50bd-413c-aacc-2179db2d8d29
  filename: Small Methods - 2026 - Ou - Photovoltaic Device Based on Monolayer Compositionally
    Graded Transition Metal Dichalcogenide.pdf
  content_type: application/pdf
  size: 1233079
  md5: 0ce235c88f80e286f3ed601b1505320a

## Thumbnail

fileset_id: 52da0568-50bd-413c-aacc-2179db2d8d29
filename: Small Methods - 2026 - Ou - Photovoltaic Device Based on Monolayer Compositionally
  Graded Transition Metal Dichalcogenide.pdf