3D charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals
Thermoelectric technology enables the harvest of waste heat and its direct conversion into electricity. The conversion efficiency is determined by the materials figure of merit Here we show a maximum of ~2.8 ± 0.5 at 773 kelvin in n-type tin selenide (SnSe) crystals out of plane. The thermal conduct...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2018-05, Vol.360 (6390), p.778-783 |
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| creator | Chang, Cheng Wu, Minghui He, Dongsheng Pei, Yanling Wu, Chao-Feng Wu, Xuefeng Yu, Hulei Zhu, Fangyuan Wang, Kedong Chen, Yue Huang, Li Li, Jing-Feng He, Jiaqing Zhao, Li-Dong |
| description | Thermoelectric technology enables the harvest of waste heat and its direct conversion into electricity. The conversion efficiency is determined by the materials figure of merit
Here we show a maximum
of ~2.8 ± 0.5 at 773 kelvin in n-type tin selenide (SnSe) crystals out of plane. The thermal conductivity in layered SnSe crystals is the lowest in the out-of-plane direction [two-dimensional (2D) phonon transport]. We doped SnSe with bromine to make n-type SnSe crystals with the overlapping interlayer charge density (3D charge transport). A continuous phase transition increases the symmetry and diverges two converged conduction bands. These two factors improve carrier mobility, while preserving a large Seebeck coefficient. Our findings can be applied in 2D layered materials and provide a new strategy to enhance out-of-plane electrical transport properties without degrading thermal properties. |
| doi_str_mv | 10.1126/science.aaq1479 |
| format | Article |
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Here we show a maximum
of ~2.8 ± 0.5 at 773 kelvin in n-type tin selenide (SnSe) crystals out of plane. The thermal conductivity in layered SnSe crystals is the lowest in the out-of-plane direction [two-dimensional (2D) phonon transport]. We doped SnSe with bromine to make n-type SnSe crystals with the overlapping interlayer charge density (3D charge transport). A continuous phase transition increases the symmetry and diverges two converged conduction bands. These two factors improve carrier mobility, while preserving a large Seebeck coefficient. Our findings can be applied in 2D layered materials and provide a new strategy to enhance out-of-plane electrical transport properties without degrading thermal properties.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.aaq1479</identifier><identifier>PMID: 29773748</identifier><language>eng</language><publisher>United States: The American Association for the Advancement of Science</publisher><subject>Bromine ; Carrier mobility ; Charge density ; Charge transport ; Conduction ; Conduction bands ; Crystals ; Current carriers ; Direct conversion ; Electrical resistivity ; Electricity ; Figure of merit ; Heat conductivity ; Heat transfer ; Interlayers ; Layered materials ; Phase transitions ; Seebeck effect ; Selenide ; Thermal conductivity ; Thermal properties ; Thermodynamic properties ; Thermoelectric materials ; Tin ; Tin selenide</subject><ispartof>Science (American Association for the Advancement of Science), 2018-05, Vol.360 (6390), p.778-783</ispartof><rights>Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.</rights><rights>Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c366t-320a85662f5744770550f42ad8b603813136f6b8a0f50e2eb60f47f943d95b03</citedby><cites>FETCH-LOGICAL-c366t-320a85662f5744770550f42ad8b603813136f6b8a0f50e2eb60f47f943d95b03</cites><orcidid>0000-0002-9515-4277 ; 0000-0002-0185-0512 ; 0000-0002-8689-6586 ; 0000-0003-1247-4345 ; 0000-0003-3954-6003</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,2871,2872,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/29773748$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chang, Cheng</creatorcontrib><creatorcontrib>Wu, Minghui</creatorcontrib><creatorcontrib>He, Dongsheng</creatorcontrib><creatorcontrib>Pei, Yanling</creatorcontrib><creatorcontrib>Wu, Chao-Feng</creatorcontrib><creatorcontrib>Wu, Xuefeng</creatorcontrib><creatorcontrib>Yu, Hulei</creatorcontrib><creatorcontrib>Zhu, Fangyuan</creatorcontrib><creatorcontrib>Wang, Kedong</creatorcontrib><creatorcontrib>Chen, Yue</creatorcontrib><creatorcontrib>Huang, Li</creatorcontrib><creatorcontrib>Li, Jing-Feng</creatorcontrib><creatorcontrib>He, Jiaqing</creatorcontrib><creatorcontrib>Zhao, Li-Dong</creatorcontrib><title>3D charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals</title><title>Science (American Association for the Advancement of Science)</title><addtitle>Science</addtitle><description>Thermoelectric technology enables the harvest of waste heat and its direct conversion into electricity. The conversion efficiency is determined by the materials figure of merit
Here we show a maximum
of ~2.8 ± 0.5 at 773 kelvin in n-type tin selenide (SnSe) crystals out of plane. The thermal conductivity in layered SnSe crystals is the lowest in the out-of-plane direction [two-dimensional (2D) phonon transport]. We doped SnSe with bromine to make n-type SnSe crystals with the overlapping interlayer charge density (3D charge transport). A continuous phase transition increases the symmetry and diverges two converged conduction bands. These two factors improve carrier mobility, while preserving a large Seebeck coefficient. Our findings can be applied in 2D layered materials and provide a new strategy to enhance out-of-plane electrical transport properties without degrading thermal properties.</description><subject>Bromine</subject><subject>Carrier mobility</subject><subject>Charge density</subject><subject>Charge transport</subject><subject>Conduction</subject><subject>Conduction bands</subject><subject>Crystals</subject><subject>Current carriers</subject><subject>Direct conversion</subject><subject>Electrical resistivity</subject><subject>Electricity</subject><subject>Figure of merit</subject><subject>Heat conductivity</subject><subject>Heat transfer</subject><subject>Interlayers</subject><subject>Layered materials</subject><subject>Phase transitions</subject><subject>Seebeck effect</subject><subject>Selenide</subject><subject>Thermal conductivity</subject><subject>Thermal properties</subject><subject>Thermodynamic properties</subject><subject>Thermoelectric 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charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals</title><author>Chang, Cheng ; Wu, Minghui ; He, Dongsheng ; Pei, Yanling ; Wu, Chao-Feng ; Wu, Xuefeng ; Yu, Hulei ; Zhu, Fangyuan ; Wang, Kedong ; Chen, Yue ; Huang, Li ; Li, Jing-Feng ; He, Jiaqing ; Zhao, Li-Dong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c366t-320a85662f5744770550f42ad8b603813136f6b8a0f50e2eb60f47f943d95b03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Bromine</topic><topic>Carrier mobility</topic><topic>Charge density</topic><topic>Charge transport</topic><topic>Conduction</topic><topic>Conduction bands</topic><topic>Crystals</topic><topic>Current carriers</topic><topic>Direct conversion</topic><topic>Electrical resistivity</topic><topic>Electricity</topic><topic>Figure of merit</topic><topic>Heat conductivity</topic><topic>Heat 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transports leading to high out-of-plane ZT in n-type SnSe crystals</atitle><jtitle>Science (American Association for the Advancement of Science)</jtitle><addtitle>Science</addtitle><date>2018-05-18</date><risdate>2018</risdate><volume>360</volume><issue>6390</issue><spage>778</spage><epage>783</epage><pages>778-783</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><abstract>Thermoelectric technology enables the harvest of waste heat and its direct conversion into electricity. The conversion efficiency is determined by the materials figure of merit
Here we show a maximum
of ~2.8 ± 0.5 at 773 kelvin in n-type tin selenide (SnSe) crystals out of plane. The thermal conductivity in layered SnSe crystals is the lowest in the out-of-plane direction [two-dimensional (2D) phonon transport]. We doped SnSe with bromine to make n-type SnSe crystals with the overlapping interlayer charge density (3D charge transport). A continuous phase transition increases the symmetry and diverges two converged conduction bands. These two factors improve carrier mobility, while preserving a large Seebeck coefficient. Our findings can be applied in 2D layered materials and provide a new strategy to enhance out-of-plane electrical transport properties without degrading thermal properties.</abstract><cop>United States</cop><pub>The American Association for the Advancement of Science</pub><pmid>29773748</pmid><doi>10.1126/science.aaq1479</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-9515-4277</orcidid><orcidid>https://orcid.org/0000-0002-0185-0512</orcidid><orcidid>https://orcid.org/0000-0002-8689-6586</orcidid><orcidid>https://orcid.org/0000-0003-1247-4345</orcidid><orcidid>https://orcid.org/0000-0003-3954-6003</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Science (American Association for the Advancement of Science), 2018-05, Vol.360 (6390), p.778-783 |
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| source | American Association for the Advancement of Science; Jstor Complete Legacy |
| subjects | Bromine Carrier mobility Charge density Charge transport Conduction Conduction bands Crystals Current carriers Direct conversion Electrical resistivity Electricity Figure of merit Heat conductivity Heat transfer Interlayers Layered materials Phase transitions Seebeck effect Selenide Thermal conductivity Thermal properties Thermodynamic properties Thermoelectric materials Tin Tin selenide |
| title | 3D charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals |
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