Realizing thermoelectric cooling and power generation in N-type PbS0.6Se0.4 via lattice plainification and interstitial doping

Lei Wang, Yi Wen, Shulin Bai, Cheng Chang, Yichen Li, Shan Liu, Dongrui Liu, Siqi Wang, Zhe Zhao, Shaoping Zhan, Qian Cao, Xiang Gao, Hongyao Xie () and Li-Dong Zhao ()
Additional contact information
Lei Wang: Beihang University
Yi Wen: Beihang University
Shulin Bai: Beihang University
Cheng Chang: Beihang University
Yichen Li: Beihang University
Shan Liu: Beihang University
Dongrui Liu: Beihang University
Siqi Wang: Beihang University
Zhe Zhao: Beihang University
Shaoping Zhan: Beihang University
Qian Cao: Huabei Cooling Device Co. LTD.
Xiang Gao: Center for High Pressure Science and Technology Advanced Research (HPSTAR)
Hongyao Xie: Beihang University
Li-Dong Zhao: Beihang University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Thermoelectrics have great potential for use in waste heat recovery to improve energy utilization. Moreover, serving as a solid-state heat pump, they have found practical application in cooling electronic products. Nevertheless, the scarcity of commercial Bi2Te3 raw materials has impeded the sustainable and widespread application of thermoelectric technology. In this study, we developed a low-cost and earth-abundant PbS compound with impressive thermoelectric performance. The optimized n-type PbS material achieved a record-high room temperature ZT of 0.64 in this system. Additionally, the first thermoelectric cooling device based on n-type PbS was fabricated, which exhibits a remarkable cooling temperature difference of ~36.9 K at room temperature. Meanwhile, the power generation efficiency of a single-leg device employing our n-type PbS material reaches ~8%, showing significant potential in harvesting waste heat into valuable electrical power. This study demonstrates the feasibility of sustainable n-type PbS as a viable alternative to commercial Bi2Te3, thereby extending the application of thermoelectrics.

Date: 2024
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DOI: 10.1038/s41467-024-48268-3

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