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Homo-composition and hetero-structure nanocomposite Pnma Bi2SeS2 - Pnnm Bi2SeS2 with high thermoelectric performance

Author

Listed:
  • Bushra Jabar

    (Shenzhen University)

  • Fu Li

    (Shenzhen University)

  • Zhuanghao Zheng

    (Shenzhen University)

  • Adil Mansoor

    (Beijing University of Technology)

  • Yongbin Zhu

    (Southern University of Science and Technology)

  • Chongbin Liang

    (Shenzhen University)

  • Dongwei Ao

    (Shenzhen University)

  • Yuexing Chen

    (Shenzhen University)

  • Guangxing Liang

    (Shenzhen University)

  • Ping Fan

    (Shenzhen University)

  • Weishu Liu

    (Southern University of Science and Technology
    Southern University of Science and Technology)

Abstract

Nanocomposite engineering decouples the transport of phonons and electrons. This usually involves the in-situ formation or ex-situ addition of nanoparticles to a material matrix with hetero-composition and hetero-structure (heC-heS) interfaces or hetero-composition and homo-structure (heC-hoS) interfaces. Herein, a quasi homo-composition and hetero-structure (hoC-heS) nanocomposite consisting of Pnma Bi2SeS2 - Pnnm Bi2SeS2 is obtained through a Br dopant-induced phase transition, providing a coherent interface between the Pnma matrix and Pnnm second phase due to the slight structural difference between the two phases. This hoC-heS nanocomposite demonstrates a significant reduction in lattice thermal conductivity (~0.40 W m−1 K−1) and an enhanced power factor (7.39 μW cm−1 K−2). Consequently, a record high figure-of-merit ZTmax = 1.12 (at 773 K) and a high average figure-of-merit ZTave = 0.72 (in the range of 323–773 K) are achieved. This work provides a general strategy for synergistically tuning electrical and thermal transport properties by designing hoC-heS nanocomposites through a dopant-induced phase transition.

Suggested Citation

  • Bushra Jabar & Fu Li & Zhuanghao Zheng & Adil Mansoor & Yongbin Zhu & Chongbin Liang & Dongwei Ao & Yuexing Chen & Guangxing Liang & Ping Fan & Weishu Liu, 2021. "Homo-composition and hetero-structure nanocomposite Pnma Bi2SeS2 - Pnnm Bi2SeS2 with high thermoelectric performance," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27564-2
    DOI: 10.1038/s41467-021-27564-2
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    References listed on IDEAS

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    1. Kanishka Biswas & Jiaqing He & Ivan D. Blum & Chun-I Wu & Timothy P. Hogan & David N. Seidman & Vinayak P. Dravid & Mercouri G. Kanatzidis, 2012. "High-performance bulk thermoelectrics with all-scale hierarchical architectures," Nature, Nature, vol. 489(7416), pages 414-418, September.
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    1. Decheng An & Senhao Zhang & Xin Zhai & Wutao Yang & Riga Wu & Huaide Zhang & Wenhao Fan & Wenxian Wang & Shaoping Chen & Oana Cojocaru-Mirédin & Xian-Ming Zhang & Matthias Wuttig & Yuan Yu, 2024. "Metavalently bonded tellurides: the essence of improved thermoelectric performance in elemental Te," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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