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Multiple valence bands convergence and strong phonon scattering lead to high thermoelectric performance in p-type PbSe

Author

Listed:
  • Yingcai Zhu

    (Beihang University)

  • Dongyang Wang

    (Beihang University)

  • Tao Hong

    (Beihang University)

  • Lei Hu

    (Xi’an Jiaotong University)

  • Toshiaki Ina

    (Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI/SPring-8))

  • Shaoping Zhan

    (Beihang University)

  • Bingchao Qin

    (Beihang University)

  • Haonan Shi

    (Beihang University)

  • Lizhong Su

    (Beihang University)

  • Xiang Gao

    (Center for High Pressure Science and Technology Advanced Research (HPSTAR))

  • Li-Dong Zhao

    (Beihang University
    Key Laboratory of Intelligent Sensing Materials and Chip Integration Technology of Zhejiang Province)

Abstract

Thermoelectric generators enable the conversion of waste heat to electricity, which is an effective way to alleviate the global energy crisis. However, the inefficiency of thermoelectric materials is the main obstacle for realizing their widespread applications and thus developing materials with high thermoelectric performance is urgent. Here we show that multiple valence bands and strong phonon scattering can be realized simultaneously in p-type PbSe through the incorporation of AgInSe2. The multiple valleys enable large weighted mobility, indicating enhanced electrical properties. Abundant nano-scale precipitates and dislocations result in strong phonon scattering and thus ultralow lattice thermal conductivity. Consequently, we achieve an exceptional ZT of ~ 1.9 at 873 K in p-type PbSe. This work demonstrates that a combination of band manipulation and microstructure engineering can be realized by tuning the composition, which is expected to be a general strategy for improving the thermoelectric performance in bulk materials.

Suggested Citation

  • Yingcai Zhu & Dongyang Wang & Tao Hong & Lei Hu & Toshiaki Ina & Shaoping Zhan & Bingchao Qin & Haonan Shi & Lizhong Su & Xiang Gao & Li-Dong Zhao, 2022. "Multiple valence bands convergence and strong phonon scattering lead to high thermoelectric performance in p-type PbSe," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31939-4
    DOI: 10.1038/s41467-022-31939-4
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    References listed on IDEAS

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    3. Yanzhong Pei & Xiaoya Shi & Aaron LaLonde & Heng Wang & Lidong Chen & G. Jeffrey Snyder, 2011. "Convergence of electronic bands for high performance bulk thermoelectrics," Nature, Nature, vol. 473(7345), pages 66-69, May.
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    Cited by:

    1. Shaoping Zhan & Tao Hong & Bingchao Qin & Yingcai Zhu & Xiang Feng & Lizhong Su & Haonan Shi & Hao Liang & Qianfan Zhang & Xiang Gao & Zhen-Hua Ge & Lei Zheng & Dongyang Wang & Li-Dong Zhao, 2022. "Realizing high-ranged thermoelectric performance in PbSnS2 crystals," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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