DC Field | Value | Language |
---|---|---|
dc.contributor.author | BAEK, CHANG KI | - |
dc.contributor.author | LEE, SEUNGHO | - |
dc.contributor.author | CHO, HYEONSU | - |
dc.contributor.author | YOON, SOL | - |
dc.contributor.author | YOO, HYEONGSEOK | - |
dc.contributor.author | SEO, MYUNGHAE | - |
dc.contributor.author | KONG, BYOUNG DON | - |
dc.contributor.author | MEYYAPPAN, MEYYA | - |
dc.date.accessioned | 2021-01-20T06:50:04Z | - |
dc.date.available | 2021-01-20T06:50:04Z | - |
dc.date.created | 2021-01-20 | - |
dc.date.issued | 2021-01 | - |
dc.identifier.issn | 1536-125X | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/104886 | - |
dc.description.abstract | Silicon nanowires (SiNWs) have attracted attention as promising high efficiency thermoelectric materials by significantly improving the thermoelectric efficiency of silicon. Here, we have fabricated cobalt silicide/silicon heterostructure on both ends of nanowires using self-aligned silicide (salicide) process. By forming cobalt silicide (CoSi2) layer on SiNWs, the thermal conductivity of SiNWs with diameters of 200, 350, and 500 nm decrease to 25.1, 31.3, and 38.1 W.m(-1).K-1, respectively, which is about 8% reduction on average. Since the phonon nanoinclusion scattering is influenced by the density of the nanoinclusions, the thermal conductivity tends to decrease as the volume fraction of CoSi2 in SiNWs increases. The Seebeck coefficient of the heterostructured nanowires increases to 255 mu V/K, which is mainly attributed to the low-energy charge carrier filtering effect due to the Schottky barrier at the CoSi2/Si interfaces. The measurements show that the figure-of-merit ZT of the heterostructured nanowires is improved by 10% on average compared with the conventional SiNWs. Consequently, the CoSi2/Si heterostructured nanowires enhance the thermoelectric properties of SiNWs effectively by suppressing phonon transport and improving electron flow. | - |
dc.language | English | - |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.relation.isPartOf | IEEE TRANSACTIONS ON NANOTECHNOLOGY | - |
dc.title | Enhanced Thermoelectric Properties of Cobalt Silicide-Silicon Heterostructured Nanowires | - |
dc.type | Article | - |
dc.identifier.doi | 10.1109/TNANO.2020.3044318 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | IEEE TRANSACTIONS ON NANOTECHNOLOGY, v.20, pp.54 - 60 | - |
dc.identifier.wosid | 000607373100003 | - |
dc.citation.endPage | 60 | - |
dc.citation.startPage | 54 | - |
dc.citation.title | IEEE TRANSACTIONS ON NANOTECHNOLOGY | - |
dc.citation.volume | 20 | - |
dc.contributor.affiliatedAuthor | BAEK, CHANG KI | - |
dc.contributor.affiliatedAuthor | LEE, SEUNGHO | - |
dc.contributor.affiliatedAuthor | CHO, HYEONSU | - |
dc.contributor.affiliatedAuthor | YOON, SOL | - |
dc.contributor.affiliatedAuthor | YOO, HYEONGSEOK | - |
dc.contributor.affiliatedAuthor | SEO, MYUNGHAE | - |
dc.contributor.affiliatedAuthor | KONG, BYOUNG DON | - |
dc.contributor.affiliatedAuthor | MEYYAPPAN, MEYYA | - |
dc.identifier.scopusid | 2-s2.0-85098791062 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | Cobalt silicide/silicon heterostructured nanowire | - |
dc.subject.keywordAuthor | thermoelectric | - |
dc.subject.keywordAuthor | phonon scattering | - |
dc.subject.keywordAuthor | electron filtering effect | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.