---
_id: '14734'
abstract:
- lang: eng
  text: Developing cost-effective and high-performance thermoelectric (TE) materials
    to assemble efficient TE devices presents a multitude of challenges and opportunities.
    Cu3SbSe4 is a promising p-type TE material based on relatively earth abundant
    elements. However, the challenge lies in its poor electrical conductivity. Herein,
    an efficient and scalable solution-based approach is developed to synthesize high-quality
    Cu3SbSe4 nanocrystals doped with Pb at the Sb site. After ligand displacement
    and annealing treatments, the dried powders are consolidated into dense pellets,
    and their TE properties are investigated. Pb doping effectively increases the
    charge carrier concentration, resulting in a significant increase in electrical
    conductivity, while the Seebeck coefficients remain consistently high. The calculated
    band structure shows that Pb doping induces band convergence, thereby increasing
    the effective mass. Furthermore, the large ionic radius of Pb2+ results in the
    generation of additional point and plane defects and interphases, dramatically
    enhancing phonon scattering, which significantly decreases the lattice thermal
    conductivity at high temperatures. Overall, a maximum figure of merit (zTmax)
    ≈ 0.85 at 653 K is obtained in Cu3Sb0.97Pb0.03Se4. This represents a 1.6-fold
    increase compared to the undoped sample and exceeds most doped Cu3SbSe4-based
    materials produced by solid-state, demonstrating advantages of versatility and
    cost-effectiveness using a solution-based technology.
acknowledgement: Y.L. acknowledges funding from the National Natural Science Foundation
  of China (NSFC) (Grants No. 22209034), the Innovation and Entrepreneurship Project
  of Overseas Returnees in Anhui Province (Grant No. 2022LCX002). K.H.L. acknowledges
  financial support from the National Natural Science Foundation of China (NSFC) (Grant
  No. 22208293). M.I. acknowledges financial support from ISTA and the Werner Siemens
  Foundation.
article_processing_charge: No
article_type: original
author:
- first_name: Shanhong
  full_name: Wan, Shanhong
  last_name: Wan
- first_name: Shanshan
  full_name: Xiao, Shanshan
  last_name: Xiao
- first_name: Mingquan
  full_name: Li, Mingquan
  last_name: Li
- first_name: Xin
  full_name: Wang, Xin
  last_name: Wang
- first_name: Khak Ho
  full_name: Lim, Khak Ho
  last_name: Lim
- first_name: Min
  full_name: Hong, Min
  last_name: Hong
- first_name: Maria
  full_name: Ibáñez, Maria
  id: 43C61214-F248-11E8-B48F-1D18A9856A87
  last_name: Ibáñez
  orcid: 0000-0001-5013-2843
- first_name: Andreu
  full_name: Cabot, Andreu
  last_name: Cabot
- first_name: Yu
  full_name: Liu, Yu
  id: 2A70014E-F248-11E8-B48F-1D18A9856A87
  last_name: Liu
  orcid: 0000-0001-7313-6740
citation:
  ama: Wan S, Xiao S, Li M, et al. Band engineering through Pb-doping of nanocrystal
    building blocks to enhance thermoelectric performance in Cu3SbSe4. <i>Small Methods</i>.
    2023. doi:<a href="https://doi.org/10.1002/smtd.202301377">10.1002/smtd.202301377</a>
  apa: Wan, S., Xiao, S., Li, M., Wang, X., Lim, K. H., Hong, M., … Liu, Y. (2023).
    Band engineering through Pb-doping of nanocrystal building blocks to enhance thermoelectric
    performance in Cu3SbSe4. <i>Small Methods</i>. Wiley. <a href="https://doi.org/10.1002/smtd.202301377">https://doi.org/10.1002/smtd.202301377</a>
  chicago: Wan, Shanhong, Shanshan Xiao, Mingquan Li, Xin Wang, Khak Ho Lim, Min Hong,
    Maria Ibáñez, Andreu Cabot, and Yu Liu. “Band Engineering through Pb-Doping of
    Nanocrystal Building Blocks to Enhance Thermoelectric Performance in Cu3SbSe4.”
    <i>Small Methods</i>. Wiley, 2023. <a href="https://doi.org/10.1002/smtd.202301377">https://doi.org/10.1002/smtd.202301377</a>.
  ieee: S. Wan <i>et al.</i>, “Band engineering through Pb-doping of nanocrystal building
    blocks to enhance thermoelectric performance in Cu3SbSe4,” <i>Small Methods</i>.
    Wiley, 2023.
  ista: Wan S, Xiao S, Li M, Wang X, Lim KH, Hong M, Ibáñez M, Cabot A, Liu Y. 2023.
    Band engineering through Pb-doping of nanocrystal building blocks to enhance thermoelectric
    performance in Cu3SbSe4. Small Methods.
  mla: Wan, Shanhong, et al. “Band Engineering through Pb-Doping of Nanocrystal Building
    Blocks to Enhance Thermoelectric Performance in Cu3SbSe4.” <i>Small Methods</i>,
    Wiley, 2023, doi:<a href="https://doi.org/10.1002/smtd.202301377">10.1002/smtd.202301377</a>.
  short: S. Wan, S. Xiao, M. Li, X. Wang, K.H. Lim, M. Hong, M. Ibáñez, A. Cabot,
    Y. Liu, Small Methods (2023).
date_created: 2024-01-07T23:00:51Z
date_published: 2023-12-28T00:00:00Z
date_updated: 2024-01-08T09:17:04Z
day: '28'
department:
- _id: MaIb
doi: 10.1002/smtd.202301377
external_id:
  pmid:
  - '38152986'
language:
- iso: eng
month: '12'
oa_version: None
pmid: 1
project:
- _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A
  name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of
    Semiconductors for Waste Heat Recovery'
publication: Small Methods
publication_identifier:
  eissn:
  - 2366-9608
publication_status: epub_ahead
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Band engineering through Pb-doping of nanocrystal building blocks to enhance
  thermoelectric performance in Cu3SbSe4
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2023'
...