Open Access
Advanced Science, volume 9, issue 20, pages 2103720
Giant Room‐Temperature Power Factor in p ‐Type Thermoelectric SnSe under High Pressure
Publication type: Journal Article
Publication date: 2022-02-20
Medicine (miscellaneous)
General Chemical Engineering
General Physics and Astronomy
General Materials Science
General Engineering
Biochemistry, Genetics and Molecular Biology (miscellaneous)
Abstract
Materials that can efficiently convert heat into electricity are widely utilized in energy conversion technologies. The existing thermoelectrics demonstrate rather limited performance characteristics at room temperature, and hence, alternative materials and approaches are very much in demand. Here, it is experimentally shown that manipulating an applied stress can greatly improve a thermoelectric power factor of layered p‐type SnSe single crystals up to ≈180 µW K−2 cm−1 at room temperature. This giant enhancement is explained by a synergetic effect of three factors, such as: band‐gap narrowing, Lifshitz transition, and strong sample deformation. Under applied pressure above 1 GPa, the SnSe crystals become more ductile, which can be related to changes in the prevailing chemical bonding type inside the layers, from covalent toward metavalent. Thus, the SnSe single crystals transform into a highly unconventional crystalline state in which their layered crystal stacking is largely preserved, while the layers themselves are strongly deformed. This results in a dramatic narrowing in a band gap, from Eg = 0.83 to 0.50 eV (at ambient conditions). Thus, the work demonstrates a novel strategy of improving the performance parameters of chalcogenide thermoelectrics via tuning their chemical bonding type, stimulating a sample deformation and a band‐structure reconstruction.
Citations by journals
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1
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Acta Materialia
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Acta Materialia
1 publication, 14.29%
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Advanced Materials
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Advanced Materials
1 publication, 14.29%
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Journal of Materials Chemistry C
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Journal of Materials Chemistry C
1 publication, 14.29%
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ChemNanoMat
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ChemNanoMat
1 publication, 14.29%
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Applied Physics Letters
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Applied Physics Letters
1 publication, 14.29%
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Modern Physics Letters B
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Modern Physics Letters B
1 publication, 14.29%
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Journal of Alloys and Compounds
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Journal of Alloys and Compounds
1 publication, 14.29%
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1
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Citations by publishers
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1
2
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Elsevier
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Elsevier
2 publications, 28.57%
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Wiley
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Wiley
2 publications, 28.57%
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Royal Society of Chemistry (RSC)
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Royal Society of Chemistry (RSC)
1 publication, 14.29%
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American Institute of Physics (AIP)
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American Institute of Physics (AIP)
1 publication, 14.29%
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World Scientific
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World Scientific
1 publication, 14.29%
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1
2
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Morozova N. V. et al. Giant Room‐Temperature Power Factor in p ‐Type Thermoelectric SnSe under High Pressure // Advanced Science. 2022. Vol. 9. No. 20. p. 2103720.
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Morozova N. V., Korobeynikov I. V., Miyajima N., Ovsyannikov S. V. Giant Room‐Temperature Power Factor in p ‐Type Thermoelectric SnSe under High Pressure // Advanced Science. 2022. Vol. 9. No. 20. p. 2103720.
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TY - JOUR
DO - 10.1002/advs.202103720
UR - https://doi.org/10.1002%2Fadvs.202103720
TI - Giant Room‐Temperature Power Factor in p ‐Type Thermoelectric SnSe under High Pressure
T2 - Advanced Science
AU - Miyajima, Nobuyoshi
AU - Morozova, Natalia V
AU - Korobeynikov, Igor V
AU - Ovsyannikov, S. V.
PY - 2022
DA - 2022/02/20 00:00:00
PB - Wiley
SP - 2103720
IS - 20
VL - 9
SN - 2198-3844
ER -
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@article{2022_Morozova,
author = {Nobuyoshi Miyajima and Natalia V Morozova and Igor V Korobeynikov and S. V. Ovsyannikov},
title = {Giant Room‐Temperature Power Factor in p ‐Type Thermoelectric SnSe under High Pressure},
journal = {Advanced Science},
year = {2022},
volume = {9},
publisher = {Wiley},
month = {feb},
url = {https://doi.org/10.1002%2Fadvs.202103720},
number = {20},
pages = {2103720},
doi = {10.1002/advs.202103720}
}
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Morozova, Natalia V., et al. “Giant Room‐Temperature Power Factor in p ‐Type Thermoelectric SnSe under High Pressure.” Advanced Science, vol. 9, no. 20, Feb. 2022, p. 2103720. https://doi.org/10.1002%2Fadvs.202103720.