# Optimization of thermoelectric performance in Sm-substituted SrSi₂ via carrier transport and lattice engineering

https://mdr.nims.go.jp/datasets/4b595c6a-2613-4295-b663-1800e81ce26d

## File

- [2025_Vikrant_SmSrSi2_STAM.pdf](https://mdr.nims.go.jp/filesets/30633eb8-a6f7-44a1-b202-9eedca85f847/download) ([Detail](https://mdr.nims.go.jp/filesets/30633eb8-a6f7-44a1-b202-9eedca85f847.md))

## Id

4b595c6a-2613-4295-b663-1800e81ce26d

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-11-13T04:58:36.918844Z

## Updated at

2025-11-13T07:30:22.814452Z

## Published at

2025-11-13T07:24:25.198571Z

## Doi



## First published url

https://doi.org/10.1080/14686996.2025.2551486

## Date published

2025-12-31

## Recorded date published

2025-12-31

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Optimization of thermoelectric performance in Sm-substituted SrSi₂ via carrier
    transport and lattice engineering
  title_type: original
  lang: en

## Description

- description: The pursuit of sustainable thermoelectric materials requires the development
    of cost-effective and efficient compounds derived from earth-abundant elements.
    Here, we investigate the effects of samarium (Sm) substitution on the thermoelectric
    performance of SrSi₂ with compo-sitions Sr1-xSmxSi2 (x = 0, 0.05, 0.1, 0.15, and
    0.2). Substituting Sm for Sr in SrSi₂ enhances the power factor at low substitution
    levels, while further substitution leads to a decrease, due to increased carrier
    scattering and reduced Seebeck coefficient. Introducing Sm substitution enhances
    phonon scattering through point defects, reducing lattice thermal conductivity.
    A peak figure of merit (ZT) of ~0.23 at room temperature is achieved for Sr₀.₉₅Sm₀.₀₅Si₂,
    demonstrating a 35% improvement over undoped SrSi₂. The weighted mobility of ~285
    cm2/ V·s and the tailored thermal transport emphasize the role of Sm substitution
    in modulating both electronic and thermal properties. These findings establish
    Sr1-xSmxSi2 as a promising candidate for next-generation thermoelectric devices.
  description_type: abstract
  lang: und

## Creator

- name: Vikrant Trivedi
  role: author
  orcid: https://orcid.org/0000-0002-6999-5646
  organization: National Institute for Materials Science
- name: Naohito Tsujii
  role: author
  orcid: https://orcid.org/0000-0002-6181-5911
  organization: National Institute for Materials Science
- name: Takao Mori
  role: author
  orcid: https://orcid.org/0000-0003-2682-1846
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Informa UK Limited

## Managing organization



## Keyword

- subject: Thermoelectric material
  schema: not_defined
- subject: silicide
  schema: not_defined
- subject: SrSi2
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Science and Technology of Advanced Materials
  issn: '14686996'
  volume: '26'
  issue: '1'
  article_number: '2551486'

## Conference



## Related item



## Funding

- identifier: JPMJMI19A1
  funder_name: JST-Mirai Program
- identifier: 24K21692
  funder_name: Japan Society for the Promotion of Science
- identifier: 24K00590
  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



## Energy level/transition state



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## Fileset

- id: 30633eb8-a6f7-44a1-b202-9eedca85f847
  filename: 2025_Vikrant_SmSrSi2_STAM.pdf
  content_type: application/pdf
  size: 12187448
  md5: 227f494d25fc3eef45c808e82ecc6b30

## Thumbnail

fileset_id: 30633eb8-a6f7-44a1-b202-9eedca85f847
filename: 2025_Vikrant_SmSrSi2_STAM.pdf