# Water Adsorption‐Induced Color Sensor: Insight Into the Sensing Mechanism and Interfacial Engineering for Improved Responsiveness

https://mdr.nims.go.jp/datasets/4b04ff93-379a-4178-b03f-3be299e9584c

## File

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## Id

4b04ff93-379a-4178-b03f-3be299e9584c

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-08-18T02:57:32.843084Z

## Updated at

2026-08-24T02:11:51.406345Z

## Published at

2026-08-24T03:27:04.789722Z

## Doi



## First published url

https://doi.org/10.1002/adfm.76809

## Date published

2026-07-23

## Recorded date published

2026-8

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Water Adsorption‐Induced Color Sensor: Insight Into the Sensing Mechanism
    and Interfacial Engineering for Improved Responsiveness'
  title_type: original
  lang: en

## Description

- description: Color-sensitive photodetectors are at the forefront of next-generation
    light- and image-sensing research. In this context, a photovoltaic device employing
    SbSI:Sb2S3 and TiO2 as the visible light absorber and electron transport material,
    respectively, exhibits a unique wavelength-dependent photovoltage effect and its
    reversible output in response to changing humidity levels. However, the specific
    functions of the individual layers of the device and their interaction with water
    remain largely unknown. In this study, we perform in situ X-ray absorption spectroscopy
    (XAS) of thin films under humidity-controlled conditions to reveal the interaction
    between water and the photovoltaic layers. The oxygen K-edge XAS data reveal the
    adsorption of water molecules onto TiO2. Ultraviolet (UV) irradiation of TiO2
    can trigger photochemical reactions of the adsorbed water at the interface, which
    is considered to contribute to changes in the photovoltage. Based on this finding,
    we introduce hydrophilic layers between TiO2 and SbSI:Sb2S3 to promote the accumulation
    of water in the devices, which successfully enhance both the wavelength sensitivity
    and response speed. Finally, we demonstrate color recognition with various irradiation
    intensities, thereby broadening the scope and applications of unique wavelength-responsive
    single-cell photovoltaics.
  description_type: abstract
  lang: eng

## Creator

- name: Tai Kobayashi
  role: author
- name: Ryosuke Nishikubo
  role: author
- name: Yusuke Tomiyori
  role: author
- name: Fumitaka Ishiwari
  role: author
- name: Daisuke Asakura
  role: author
- name: Eiji Hosono
  role: author
- name: Miho Kitamura
  role: author
- name: Hisao Kiuchi
  role: author
  orcid: https://orcid.org/0000-0001-9139-8218
  organization: National Institute for Materials Science
- name: Yoshihisa Harada
  role: author
- name: Akinori Saeki
  role: author

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: antimony
  schema: not_defined
- subject: color-sensing
  schema: not_defined
- subject: photodetector
  schema: not_defined
- subject: photovoltaics
  schema: not_defined
- subject: TiO2
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: ADVANCED FUNCTIONAL MATERIALS
  issn: '16163028'
  volume: '36'
  issue: '67'

## Conference



## Related item



## Funding

- identifier: P24H00484
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23K13826
  funder_name: Japan Society for the Promotion of Science
- identifier: JP25K01857
  funder_name: Japan Society for the Promotion of Science
- identifier: JP20H05836
  funder_name: Japan Society for the Promotion of Science
- identifier: JP19H05717
  funder_name: Japan Society for the Promotion of Science
- identifier: JP22H04541
  funder_name: Japan Society for the Promotion of Science
- identifier: JP22H05145
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23H04626
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJCR23O2
  funder_name: Japan Science and Technology Agency
- identifier: JPMJSP2138
  funder_name: Japan Science and Technology Agency
- funder_name: Mazda Foundation
- funder_name: Yashima Environment Technology 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: 8d0cc285-d581-47ea-b40d-c39adce91809
  filename: adfm76809-sup-0001-suppmat.pdf
  content_type: application/pdf
  size: 1867884
  md5: 0afd0cd789032c4dc0ed7faed28879fc
- id: 3fda8ea9-0444-4940-acd3-5bfbe6f89e3a
  filename: Adv Funct Materials - 2026 - Kobayashi - Water Adsorption‐Induced Color
    Sensor  Insight Into the Sensing Mechanism and.pdf
  content_type: application/pdf
  size: 2330169
  md5: 25cb66d1f3df4eb2ed0a32e2fc0c126f

## Thumbnail

fileset_id: 3fda8ea9-0444-4940-acd3-5bfbe6f89e3a
filename: Adv Funct Materials - 2026 - Kobayashi - Water Adsorption‐Induced Color
  Sensor  Insight Into the Sensing Mechanism and.pdf