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Article: Raising the solubility of Gd yields superior thermoelectric performance in n-type PbSe

TitleRaising the solubility of Gd yields superior thermoelectric performance in n-type PbSe
Authors
Issue Date5-Sep-2022
PublisherRoyal Society of Chemistry
Citation
Journal of Materials Chemistry A: materials for energy and sustainability, 2022, v. 10, n. 38, p. 20386-20395 How to Cite?
AbstractChemical doping is an indispensable means of improving the performance of thermoelectric materials, while one bottleneck for maximizing optimization is the low solubility of dopants. Here, we report a striking new insight that the more electronegative Br doping not only synergistically optimizes the carrier concentration and enhances the electron mobility, but also promotes the solubility limit of Gd in the n-type PbSe matrix, which is beneficial for Gd to flatten the conduction band. This is a successful strategy to improve the Seebeck coefficient to maximize the power factor. Concurrently, the anomalous strain field induced by atomic disorder and dislocation in the n-type Pb1-yGdyBr0.003Se0.997 system strongly scatters multi-frequency phonons, which reduces the lattice thermal conductivity markedly. As a result, a superior figure of merit (zT) value of similar to 1.4 at 873 K and ultra-high power factor in a wide-temperature range are achieved for n-type Pb0.997Gd0.003Br0.003Se0.997. This work provides a unique paradigm to improve thermoelectrics by increasing the solid solubility of dopants.
Persistent Identifierhttp://hdl.handle.net/10722/331094
ISSN
2023 Impact Factor: 10.7
2023 SCImago Journal Rankings: 2.804
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDeng, Q-
dc.contributor.authorZhong, Y-
dc.contributor.authorZhao, CY-
dc.contributor.authorZhang, FJ-
dc.contributor.authorXia, CL-
dc.contributor.authorChen, Y-
dc.contributor.authorAng, R-
dc.date.accessioned2023-09-21T06:52:41Z-
dc.date.available2023-09-21T06:52:41Z-
dc.date.issued2022-09-05-
dc.identifier.citationJournal of Materials Chemistry A: materials for energy and sustainability, 2022, v. 10, n. 38, p. 20386-20395-
dc.identifier.issn2050-7488-
dc.identifier.urihttp://hdl.handle.net/10722/331094-
dc.description.abstractChemical doping is an indispensable means of improving the performance of thermoelectric materials, while one bottleneck for maximizing optimization is the low solubility of dopants. Here, we report a striking new insight that the more electronegative Br doping not only synergistically optimizes the carrier concentration and enhances the electron mobility, but also promotes the solubility limit of Gd in the n-type PbSe matrix, which is beneficial for Gd to flatten the conduction band. This is a successful strategy to improve the Seebeck coefficient to maximize the power factor. Concurrently, the anomalous strain field induced by atomic disorder and dislocation in the n-type Pb1-yGdyBr0.003Se0.997 system strongly scatters multi-frequency phonons, which reduces the lattice thermal conductivity markedly. As a result, a superior figure of merit (zT) value of similar to 1.4 at 873 K and ultra-high power factor in a wide-temperature range are achieved for n-type Pb0.997Gd0.003Br0.003Se0.997. This work provides a unique paradigm to improve thermoelectrics by increasing the solid solubility of dopants.-
dc.languageeng-
dc.publisherRoyal Society of Chemistry-
dc.relation.ispartofJournal of Materials Chemistry A: materials for energy and sustainability-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleRaising the solubility of Gd yields superior thermoelectric performance in n-type PbSe-
dc.typeArticle-
dc.identifier.doi10.1039/d2ta06161a-
dc.identifier.scopuseid_2-s2.0-85139201152-
dc.identifier.volume10-
dc.identifier.issue38-
dc.identifier.spage20386-
dc.identifier.epage20395-
dc.identifier.eissn2050-7496-
dc.identifier.isiWOS:000852740100001-
dc.publisher.placeCAMBRIDGE-
dc.identifier.issnl2050-7496-

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