# Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit

https://mdr.nims.go.jp/datasets/d4084a54-0c1a-4987-a3bb-5e635ba7ebea

## File

- [s41598-025-12345-4.pdf](https://mdr.nims.go.jp/filesets/14ac4d57-e1d5-4bd9-ba08-80566437a5fa/download) ([Detail](https://mdr.nims.go.jp/filesets/14ac4d57-e1d5-4bd9-ba08-80566437a5fa.md))
- [Supplementary information TE_CuSeO_SciRep_04212025_final.pdf](https://mdr.nims.go.jp/filesets/5bc77468-15d8-4d32-b5d3-1b4ff22f6268/download) ([Detail](https://mdr.nims.go.jp/filesets/5bc77468-15d8-4d32-b5d3-1b4ff22f6268.md))

## Id

d4084a54-0c1a-4987-a3bb-5e635ba7ebea

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-08-26T08:23:31.895694Z

## Updated at

2025-08-27T03:30:36.367853Z

## Published at

2025-08-27T03:18:07.450878Z

## Doi



## First published url

https://doi.org/10.1038/s41598-025-12345-4

## Date published

2025-07-26

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure
    of merit
  title_type: original
  lang: en

## Description

- description: Thermoelectric (TE) materials offer a promising pathway toward achieving
    carbon neutrality by converting waste heat into electricity. The enhancement of
    their figure-of-merit (zT) depends on optimizing the composition of materials
    and nanostructures, reducing the thermal conductivity, and increasing the power
    factor. Cu2Se, a superionic material, achieves a zT of 0.4 at 300 K by facilitating
    Cu ion movement within its face-centered cubic lattice, effectively suppressing
    thermal conductivity. Herein, we present a novel TE material developed by doping
    CuxSe crystals of different compositions with FeSi2. We report a remarkable zT
    of 0.69 at 298 K for Cu2Se-based materials and reveal the presence of the CuO
    and Cu2O tiny crystals on the material surface, uniform dispersion of Si within
    the film, and formation of distinctive amorphous FeO. Our strategy holds great
    potential for notably advancing waste heat recovery in sustainable TE materials.
  description_type: abstract
  lang: und

## Creator

- name: Masahiro Goto
  role: author
  orcid: https://orcid.org/0000-0002-1003-2781
- name: Michiko Sasaki
  role: author
- name: Taku Moronaga
  role: author
  orcid: https://orcid.org/0000-0002-6915-0627
- name: Toru Hara
  role: author
  orcid: https://orcid.org/0000-0002-9715-6444
- name: Yibin Xu
  role: author
  orcid: https://orcid.org/0000-0001-8600-8748

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Thermoelectric
  schema: not_defined
- subject: Cu2Se
  schema: not_defined
- subject: Sputter
  schema: not_defined
- subject: Thin film
  schema: not_defined
- subject: Composite
  schema: not_defined
- subject: FeSi2
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Scientific Reports
  issn: '20452322'
  volume: '15'
  issue: '1'
  article_number: '27278'

## Conference



## Related item



## Funding

- identifier: 24K07349
  funder_name: Japan Science and Technology Agency, Grant-in-Aid for Scientific Research
- identifier: 25K08337
  funder_name: Japan Science and Technology Agency, Grant-in-Aid for Scientific Research
- identifier: JPMJCR21O2
  funder_name: Japan Science and Technology Agency, CREST
- identifier: JPMJCR21O2
  funder_name: Japan Science and Technology Agency, CREST

## 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: 14ac4d57-e1d5-4bd9-ba08-80566437a5fa
  filename: s41598-025-12345-4.pdf
  content_type: application/pdf
  size: 4327420
  md5: 212f2e1844ffe0134d89f2a9c0bc71a7
- id: 5bc77468-15d8-4d32-b5d3-1b4ff22f6268
  filename: Supplementary information TE_CuSeO_SciRep_04212025_final.pdf
  content_type: application/pdf
  size: 1793413
  md5: 231c61cd97e881b0405d4780be9e59dc

## Thumbnail

fileset_id: 14ac4d57-e1d5-4bd9-ba08-80566437a5fa
filename: s41598-025-12345-4.pdf