# High Power Factor with Compositional and Temperature Stabilities in (Ca<sub>  <i>x</i></sub>Sr<sub>1–<i>x</i></sub>)Si<sub>2</sub> Thin Films near Room Temperature

https://mdr.nims.go.jp/datasets/3973f3c1-b1bd-4951-b256-c83d8d04ca9e

## File

- [CaSrSi2_20250713_re_submit-version.pdf](https://mdr.nims.go.jp/filesets/7c8673ba-cfe3-4fd2-bf22-e42c11538588/download) ([Detail](https://mdr.nims.go.jp/filesets/7c8673ba-cfe3-4fd2-bf22-e42c11538588.md))

## Id

3973f3c1-b1bd-4951-b256-c83d8d04ca9e

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-18T04:01:30.492605Z

## Updated at

2026-04-30T03:01:11.491392Z

## Published at

2026-08-06T23:33:06.960838Z

## Doi

https://doi.org/10.48505/nims.6033

## First published url

https://doi.org/10.1021/acsaem.5c01558

## Date published

2025-08-25

## Recorded date published

2025-8-25

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: High Power Factor with Compositional and Temperature Stabilities in (Ca<sub><i>x</i></sub>Sr<sub>1–<i>x</i></sub>)Si<sub>2</sub>
    Thin Films near Room Temperature
  title_type: original
  lang: en

## Description

- description: The effects of Ca content (x) on the crystalline phases and thermoelectric
    properties of (CaxSr1–x)Si2 films were investigated. The solubility limit of the
    cubic phase was found to be narrow, with x = 0.08, compared to that of arc-melted
    samples. For x ≥ 0.17, a mixed phase was observed, which included a layer phase
    not previously reported in the arc-melted samples. In both the single cubic-phase
    region and the mixed-phase regions, the electrical resistivity and Seebeck coefficient
    varied systematically with x at 323 K. Consequently, a high power factor of approximately
    1000 μW m–1 K–2 was achieved over a wide composition range (x = 0.03 to 0.17)
    at 323 K. The wide compositional tolerance for a high power factor is advantageous
    for practical fabrication and offers robustness against compositional fluctuations.
    In addition, the power factor remained above 850 μW m–1 K–2 within the temperature
    range of 223 to 373 K for x = 0.04 to 0.13. These results highlight that (CaxSr1–x)Si2
    films with a predominantly cubic phase are promising candidates for thermoelectric
    applications near room temperature due to their high power factor across a broad
    range of compositions and temperatures. Furthermore, the highest power factor
    of 2000 μW m–1 K–2 was achieved at 210 K for the film with x = 0.04, which consisted
    solely of the cubic phase. The value exceeds that of previously reported SrSi2
    films prepared using the same sputtering method.
  description_type: abstract
  lang: und

## Creator

- name: Kodai Aoyama
  role: author
  orcid: https://orcid.org/0009-0002-0932-7395
- name: Takao Shimizu
  role: author
  orcid: https://orcid.org/0000-0001-9508-7601
- name: Takayoshi Katase
  role: author
  orcid: https://orcid.org/0000-0002-2593-7487
- name: Yoshisato Kimura
  role: author
- name: Hiroshi Funakubo
  role: author
  orcid: https://orcid.org/0000-0002-1106-200X

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Thermoelectrics
  schema: not_defined
- subject: Electronic property
  schema: not_defined
- subject: Crystal structure
  schema: not_defined
- subject: Silicide
  schema: not_defined
- subject: Sputtering
  schema: not_defined

## Rights

- description: This document is the Accepted Manuscript version of a Published Work
    that appeared in final form in ACS Applied Energy Materials, copyright © 2025
    American Chemical Society after peer review and technical editing by the publisher.
    To access the final edited and published work see https://doi.org/10.1021/acsaem.5c01558.
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2025-08-07
end_date: 2026-08-07

## Journal

- title: ACS Applied Energy Materials
  issn: '25740962'
  volume: '8'
  issue: '16'
  start_page: 12092
  end_page: 12098

## Conference



## Related item



## Funding

- identifier: JPMXP1122683430
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

## 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: 7c8673ba-cfe3-4fd2-bf22-e42c11538588
  filename: CaSrSi2_20250713_re_submit-version.pdf
  content_type: application/pdf
  size: 791402
  md5: f1235acb555b4ef5e00eb771dae4cc7d

## Thumbnail

fileset_id: 7c8673ba-cfe3-4fd2-bf22-e42c11538588
filename: CaSrSi2_20250713_re_submit-version.pdf