# Suppressing Light-Induced Phase Segregation via Dual Interface Modification for High-Performance and Stable Inverted CsPbIBr<sub>2</sub> Perovskite Solar Cells

https://mdr.nims.go.jp/datasets/37e0eb70-d0fb-4faf-9f6d-16ee4b66bee2

## File

- [Suppressing Light-Induced Phase Segregation via Dual Interfaces Modification for High-Performance and Stable Inverted CsPbIBr2 Perovskite Solar Cells.docx](https://mdr.nims.go.jp/filesets/556773ad-2d6d-4dd3-b73b-6e4a83da54a1/download) ([Detail](https://mdr.nims.go.jp/filesets/556773ad-2d6d-4dd3-b73b-6e4a83da54a1.md))

## Id

37e0eb70-d0fb-4faf-9f6d-16ee4b66bee2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-02T05:48:36.630094Z

## Updated at

2025-12-02T23:30:10.971310Z

## Published at

2025-12-02T23:22:52.391512Z

## Doi

https://doi.org/10.48505/nims.5950

## First published url

https://doi.org/10.1021/acsami.5c04349

## Date published

2025-06-11

## Recorded date published

2025-6-11

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Suppressing Light-Induced Phase Segregation via Dual Interface Modification
    for High-Performance and Stable Inverted CsPbIBr<sub>2</sub> Perovskite Solar
    Cells
  title_type: original
  lang: en

## Description

- description: 'Wide-bandgap perovskite materials are gaining enormous attention recently,
    particularly in multijunction photovoltaics. Despite the encouraging development,
    light-induced phase segregation still impedes their operational stability, primarily
    due to the high content of bromide constituents. Here, we report a bilateral interface
    design to mitigate the phase instability of 2.1 eV bandgap all-inorganic CsPbIBr2
    perovskite solar cells (PSCs)─(1) buried interface: strong chemical interactions
    occur between nickel oxide (NiOx) and self-assembled monolayer (SAM) via phosphonic
    acid anchoring groups, establishing an interfacial bridge that promotes efficient
    hole extraction. (2) Top surface: a solution-processed BCP (s-BCP) layer is introduced
    to passivate the perovskite film and suppress trap-assisted recombination, resulting
    in reduced phase segregation. The synergistic effect of dual interfaces reduces
    defect formation, moisture penetration, and phase transition, contributing to
    enhanced phase stability. Optimal energetic alignment and defect passivation lead
    to improved photovoltaic (PV) performance. As a result, the dual interface modification
    delivers a power conversion efficiency (PCE) of 10.2% with a fill factor of 82.3%.
    Additionally, the modified device retains >87% of its initial efficiency after
    110 h of continuous operation and exhibits merely 5% degradation after 300 days
    of storage, which is one of the most stable performances reported for all-inorganic
    CsPbIBr2 PSCs. This work reveals a key strategy to address inherent phase instability
    in wide-bandgap perovskites through interface engineering.'
  description_type: abstract
  lang: und

## Creator

- name: Siliang Cao
  role: author
- name: Yulu He
  role: author
- name: Md. Abdul Karim
  role: author
  organization: National Institute for Materials Science
- name: Shamim Ahmmed
  role: author
- name: Md. Emrul Kayesh
  role: author
  organization: National Institute for Materials Science
- name: Yun Jia
  role: author
- name: Takeaki Sakurai
  role: author
- name: Ashraful Islam
  role: author
  orcid: https://orcid.org/0000-0002-1633-1432
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Perovskite Solar Cells
  schema: not_defined
- subject: CsPbIBr2
  schema: not_defined
- subject: Light-Induced Phase Segregation
  schema: not_defined

## Rights

- description: This document is the unedited Author’s version of a Submitted Work
    that was subsequently accepted for publication in ACS Applied Materials & Interfaces,
    copyright © 2025 American Chemical Society after peer review. To access the final
    edited and published work see https://doi.org/10.1021/acsami.5c04349.
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: ACS Applied Materials & Interfaces
  issn: '19448252'
  volume: '17'
  issue: '23'
  start_page: 34794
  end_page: 34807

## Conference



## Related item



## Funding

- identifier: JPMJMI21E6
  funder_name: JST-Mirai Program
- identifier: 22H02190
  funder_name: New Energy and Industrial Technology Development Organization
- identifier: JPMJAN23B2
  funder_name: Chinese Government Scholarship
- identifier: 22H02190
  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



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## Fileset

- id: 556773ad-2d6d-4dd3-b73b-6e4a83da54a1
  filename: Suppressing Light-Induced Phase Segregation via Dual Interfaces Modification
    for High-Performance and Stable Inverted CsPbIBr2 Perovskite Solar Cells.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 15217189
  md5: a0290b5f6ec2727b95046ce139f61cfb

## Thumbnail

fileset_id: 556773ad-2d6d-4dd3-b73b-6e4a83da54a1
filename: Suppressing Light-Induced Phase Segregation via Dual Interfaces Modification
  for High-Performance and Stable Inverted CsPbIBr2 Perovskite Solar Cells.docx